tools: update ESLint to 5.3.0

PR-URL: https://github.com/nodejs/node/pull/22134
Reviewed-By: Bryan English <bryan@bryanenglish.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>

tools/node_modules/eslint/conf/eslint-recommended.js

@@ -83,6 +83,7 @@ module.exports = {
         "newline-per-chained-call": "off",
         "no-alert": "off",
         "no-array-constructor": "off",
+        "no-async-promise-executor": "off",
         "no-await-in-loop": "off",
         "no-bitwise": "off",
         "no-buffer-constructor": "off",
@@ -139,6 +140,7 @@ module.exports = {
         "no-lonely-if": "off",
         "no-loop-func": "off",
         "no-magic-numbers": "off",
+        "no-misleading-character-class": "off",
         "no-mixed-operators": "off",
         "no-mixed-requires": "off",
         "no-mixed-spaces-and-tabs": "error",
@@ -240,8 +242,10 @@ module.exports = {
         "quote-props": "off",
         quotes: "off",
         radix: "off",
+        "require-atomic-updates": "off",
         "require-await": "off",
         "require-jsdoc": "off",
+        "require-unicode-regexp": "off",
         "require-yield": "error",
         "rest-spread-spacing": "off",
         semi: "off",

tools/node_modules/eslint/lib/cli-engine.js

@@ -22,7 +22,7 @@ const fs = require("fs"),
     IgnoredPaths = require("./ignored-paths"),
     Config = require("./config"),
     LintResultCache = require("./util/lint-result-cache"),
-    globUtil = require("./util/glob-util"),
+    globUtils = require("./util/glob-utils"),
     validator = require("./config/config-validator"),
     hash = require("./util/hash"),
     ModuleResolver = require("./util/module-resolver"),
@@ -41,7 +41,7 @@ const resolver = new ModuleResolver();
  * The options to configure a CLI engine with.
  * @typedef {Object} CLIEngineOptions
  * @property {boolean} allowInlineConfig Enable or disable inline configuration comments.
- * @property {boolean|Object} baseConfig Base config object. True enables recommend rules and environments.
+ * @property {Object} baseConfig Base config object, extended by all configs used with this CLIEngine instance
  * @property {boolean} cache Enable result caching.
  * @property {string} cacheLocation The cache file to use instead of .eslintcache.
  * @property {string} configFile The configuration file to use.
@@ -492,7 +492,7 @@ class CLIEngine {
      * @returns {string[]} The equivalent glob patterns.
      */
     resolveFileGlobPatterns(patterns) {
-        return globUtil.resolveFileGlobPatterns(patterns.filter(Boolean), this.options);
+        return globUtils.resolveFileGlobPatterns(patterns.filter(Boolean), this.options);
     }
 
     /**
@@ -511,25 +511,25 @@ class CLIEngine {
         }
 
         const startTime = Date.now();
-        const fileList = globUtil.listFilesToProcess(patterns, options);
+        const fileList = globUtils.listFilesToProcess(patterns, options);
         const results = fileList.map(fileInfo => {
             if (fileInfo.ignored) {
                 return createIgnoreResult(fileInfo.filename, options.cwd);
             }
 
             if (options.cache) {
-
-                /*
-                 * get the descriptor for this file
-                 * with the metadata and the flag that determines if
-                 * the file has changed
-                 */
                 const cachedLintResults = lintResultCache.getCachedLintResults(fileInfo.filename);
 
                 if (cachedLintResults) {
-                    debug(`Skipping file since it hasn't changed: ${fileInfo.filename}`);
+                    const resultHadMessages = cachedLintResults.messages && cachedLintResults.messages.length;
 
-                    return cachedLintResults;
+                    if (resultHadMessages && options.fix) {
+                        debug(`Reprocessing cached file to allow autofix: ${fileInfo.filename}`);
+                    } else {
+                        debug(`Skipping file since it hasn't changed: ${fileInfo.filename}`);
+
+                        return cachedLintResults;
+                    }
                 }
             }
 

tools/node_modules/eslint/lib/code-path-analysis/code-path-analyzer.js

@@ -14,7 +14,7 @@ const assert = require("assert"),
     CodePathSegment = require("./code-path-segment"),
     IdGenerator = require("./id-generator"),
     debug = require("./debug-helpers"),
-    astUtils = require("../ast-utils");
+    astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/config.js

@@ -15,7 +15,7 @@ const path = require("path"),
     ConfigFile = require("./config/config-file"),
     ConfigCache = require("./config/config-cache"),
     Plugins = require("./config/plugins"),
-    FileFinder = require("./file-finder"),
+    FileFinder = require("./util/file-finder"),
     isResolvable = require("is-resolvable");
 
 const debug = require("debug")("eslint:config");

tools/node_modules/eslint/lib/config/config-initializer.js

@@ -16,9 +16,9 @@ const util = require("util"),
     autoconfig = require("./autoconfig.js"),
     ConfigFile = require("./config-file"),
     ConfigOps = require("./config-ops"),
-    getSourceCodeOfFiles = require("../util/source-code-util").getSourceCodeOfFiles,
+    getSourceCodeOfFiles = require("../util/source-code-utils").getSourceCodeOfFiles,
     ModuleResolver = require("../util/module-resolver"),
-    npmUtil = require("../util/npm-util"),
+    npmUtils = require("../util/npm-utils"),
     recConfig = require("../../conf/eslint-recommended"),
     log = require("../util/logging");
 
@@ -61,7 +61,7 @@ function writeFile(config, format) {
 /**
  * Get the peer dependencies of the given module.
  * This adds the gotten value to cache at the first time, then reuses it.
- * In a process, this function is called twice, but `npmUtil.fetchPeerDependencies` needs to access network which is relatively slow.
+ * In a process, this function is called twice, but `npmUtils.fetchPeerDependencies` needs to access network which is relatively slow.
  * @param {string} moduleName The module name to get.
  * @returns {Object} The peer dependencies of the given module.
  * This object is the object of `peerDependencies` field of `package.json`.
@@ -73,7 +73,7 @@ function getPeerDependencies(moduleName) {
     if (!result) {
         log.info(`Checking peerDependencies of ${moduleName}`);
 
-        result = npmUtil.fetchPeerDependencies(moduleName);
+        result = npmUtils.fetchPeerDependencies(moduleName);
         getPeerDependencies.cache.set(moduleName, result);
     }
 
@@ -109,7 +109,7 @@ function getModulesList(config, installESLint) {
     if (installESLint === false) {
         delete modules.eslint;
     } else {
-        const installStatus = npmUtil.checkDevDeps(["eslint"]);
+        const installStatus = npmUtils.checkDevDeps(["eslint"]);
 
         // Mark to show messages if it's new installation of eslint.
         if (installStatus.eslint === false) {
@@ -373,7 +373,7 @@ function hasESLintVersionConflict(answers) {
  */
 function installModules(modules) {
     log.info(`Installing ${modules.join(", ")}`);
-    npmUtil.installSyncSaveDev(modules);
+    npmUtils.installSyncSaveDev(modules);
 }
 
 /* istanbul ignore next: no need to test inquirer */
@@ -438,7 +438,7 @@ function promptUser() {
                 { name: "Google (https://github.com/google/eslint-config-google)", value: "google" }
             ],
             when(answers) {
-                answers.packageJsonExists = npmUtil.checkPackageJson();
+                answers.packageJsonExists = npmUtils.checkPackageJson();
                 return answers.source === "guide" && answers.packageJsonExists;
             }
         },

tools/node_modules/eslint/lib/ignored-paths.js

@@ -12,7 +12,7 @@
 const fs = require("fs"),
     path = require("path"),
     ignore = require("ignore"),
-    pathUtil = require("./util/path-util");
+    pathUtils = require("./util/path-utils");
 
 const debug = require("debug")("eslint:ignored-paths");
 
@@ -79,6 +79,40 @@ function mergeDefaultOptions(options) {
     return Object.assign({}, DEFAULT_OPTIONS, options);
 }
 
+/* eslint-disable valid-jsdoc */
+/**
+ * Normalize the path separators in a given string.
+ * On Windows environment, this replaces `\` by `/`.
+ * Otherwrise, this does nothing.
+ * @param {string} str The path string to normalize.
+ * @returns {string} The normalized path.
+ */
+const normalizePathSeps = path.sep === "/"
+    ? (str => str)
+    : ((seps, str) => str.replace(seps, "/")).bind(null, new RegExp(`\\${path.sep}`, "g"));
+/* eslint-enable valid-jsdoc */
+
+/**
+ * Converts a glob pattern to a new glob pattern relative to a different directory
+ * @param {string} globPattern The glob pattern, relative the the old base directory
+ * @param {string} relativePathToOldBaseDir A relative path from the new base directory to the old one
+ * @returns {string} A glob pattern relative to the new base directory
+ */
+function relativize(globPattern, relativePathToOldBaseDir) {
+    if (relativePathToOldBaseDir === "") {
+        return globPattern;
+    }
+
+    const prefix = globPattern.startsWith("!") ? "!" : "";
+    const globWithoutPrefix = globPattern.replace(/^!/, "");
+
+    if (globWithoutPrefix.startsWith("/")) {
+        return `${prefix}/${normalizePathSeps(relativePathToOldBaseDir)}${globWithoutPrefix}`;
+    }
+
+    return globPattern;
+}
+
 //------------------------------------------------------------------------------
 // Public Interface
 //------------------------------------------------------------------------------
@@ -96,24 +130,30 @@ class IgnoredPaths {
 
         this.cache = {};
 
-        /**
-         * add pattern to node-ignore instance
-         * @param {Object} ig, instance of node-ignore
-         * @param {string} pattern, pattern do add to ig
-         * @returns {array} raw ignore rules
-         */
-        function addPattern(ig, pattern) {
-            return ig.addPattern(pattern);
-        }
-
         this.defaultPatterns = [].concat(DEFAULT_IGNORE_DIRS, options.patterns || []);
-        this.baseDir = options.cwd;
+
+        this.ignoreFileDir = options.ignore !== false && options.ignorePath
+            ? path.dirname(path.resolve(options.cwd, options.ignorePath))
+            : options.cwd;
+        this.options = options;
+        this._baseDir = null;
 
         this.ig = {
             custom: ignore(),
             default: ignore()
         };
 
+        this.defaultPatterns.forEach(pattern => this.addPatternRelativeToCwd(this.ig.default, pattern));
+        if (options.dotfiles !== true) {
+
+            /*
+             * ignore files beginning with a dot, but not files in a parent or
+             * ancestor directory (which in relative format will begin with `../`).
+             */
+            this.addPatternRelativeToCwd(this.ig.default, ".*");
+            this.addPatternRelativeToCwd(this.ig.default, "!../");
+        }
+
         /*
          * Add a way to keep track of ignored files.  This was present in node-ignore
          * 2.x, but dropped for now as of 3.0.10.
@@ -121,17 +161,6 @@ class IgnoredPaths {
         this.ig.custom.ignoreFiles = [];
         this.ig.default.ignoreFiles = [];
 
-        if (options.dotfiles !== true) {
-
-            /*
-             * ignore files beginning with a dot, but not files in a parent or
-             * ancestor directory (which in relative format will begin with `../`).
-             */
-            addPattern(this.ig.default, [".*", "!../"]);
-        }
-
-        addPattern(this.ig.default, this.defaultPatterns);
-
         if (options.ignore !== false) {
             let ignorePath;
 
@@ -154,13 +183,11 @@ class IgnoredPaths {
                     debug(`Loaded ignore file ${ignorePath}`);
                 } catch (e) {
                     debug("Could not find ignore file in cwd");
-                    this.options = options;
                 }
             }
 
             if (ignorePath) {
                 debug(`Adding ${ignorePath}`);
-                this.baseDir = path.dirname(path.resolve(options.cwd, ignorePath));
                 this.addIgnoreFile(this.ig.custom, ignorePath);
                 this.addIgnoreFile(this.ig.default, ignorePath);
             } else {
@@ -187,8 +214,8 @@ class IgnoredPaths {
                         if (packageJSONOptions.eslintIgnore) {
                             if (Array.isArray(packageJSONOptions.eslintIgnore)) {
                                 packageJSONOptions.eslintIgnore.forEach(pattern => {
-                                    addPattern(this.ig.custom, pattern);
-                                    addPattern(this.ig.default, pattern);
+                                    this.addPatternRelativeToIgnoreFile(this.ig.custom, pattern);
+                                    this.addPatternRelativeToIgnoreFile(this.ig.default, pattern);
                                 });
                             } else {
                                 throw new TypeError("Package.json eslintIgnore property requires an array of paths");
@@ -202,12 +229,68 @@ class IgnoredPaths {
             }
 
             if (options.ignorePattern) {
-                addPattern(this.ig.custom, options.ignorePattern);
-                addPattern(this.ig.default, options.ignorePattern);
+                this.addPatternRelativeToCwd(this.ig.custom, options.ignorePattern);
+                this.addPatternRelativeToCwd(this.ig.default, options.ignorePattern);
             }
         }
+    }
 
-        this.options = options;
+    /*
+     * If `ignoreFileDir` is a subdirectory of `cwd`, all paths will be normalized to be relative to `cwd`.
+     * Otherwise, all paths will be normalized to be relative to `ignoreFileDir`.
+     * This ensures that the final normalized ignore rule will not contain `..`, which is forbidden in
+     * ignore rules.
+     */
+
+    addPatternRelativeToCwd(ig, pattern) {
+        const baseDir = this.getBaseDir();
+        const cookedPattern = baseDir === this.options.cwd
+            ? pattern
+            : relativize(pattern, path.relative(baseDir, this.options.cwd));
+
+        ig.addPattern(cookedPattern);
+        debug("addPatternRelativeToCwd:\n  original = %j\n  cooked   = %j", pattern, cookedPattern);
+    }
+
+    addPatternRelativeToIgnoreFile(ig, pattern) {
+        const baseDir = this.getBaseDir();
+        const cookedPattern = baseDir === this.ignoreFileDir
+            ? pattern
+            : relativize(pattern, path.relative(baseDir, this.ignoreFileDir));
+
+        ig.addPattern(cookedPattern);
+        debug("addPatternRelativeToIgnoreFile:\n  original = %j\n  cooked   = %j", pattern, cookedPattern);
+    }
+
+    // Detect the common ancestor
+    getBaseDir() {
+        if (!this._baseDir) {
+            const a = path.resolve(this.options.cwd);
+            const b = path.resolve(this.ignoreFileDir);
+            let lastSepPos = 0;
+
+            // Set the shorter one (it's the common ancestor if one includes the other).
+            this._baseDir = a.length < b.length ? a : b;
+
+            // Set the common ancestor.
+            for (let i = 0; i < a.length && i < b.length; ++i) {
+                if (a[i] !== b[i]) {
+                    this._baseDir = a.slice(0, lastSepPos);
+                    break;
+                }
+                if (a[i] === path.sep) {
+                    lastSepPos = i;
+                }
+            }
+
+            // If it's only Windows drive letter, it needs \
+            if (/^[A-Z]:$/.test(this._baseDir)) {
+                this._baseDir += "\\";
+            }
+
+            debug("baseDir = %j", this._baseDir);
+        }
+        return this._baseDir;
     }
 
     /**
@@ -217,7 +300,7 @@ class IgnoredPaths {
      */
     readIgnoreFile(filePath) {
         if (typeof this.cache[filePath] === "undefined") {
-            this.cache[filePath] = fs.readFileSync(filePath, "utf8");
+            this.cache[filePath] = fs.readFileSync(filePath, "utf8").split(/\r?\n/g).filter(Boolean);
         }
         return this.cache[filePath];
     }
@@ -226,11 +309,13 @@ class IgnoredPaths {
      * add ignore file to node-ignore instance
      * @param {Object} ig, instance of node-ignore
      * @param {string} filePath, file to add to ig
-     * @returns {array} raw ignore rules
+     * @returns {void}
      */
     addIgnoreFile(ig, filePath) {
         ig.ignoreFiles.push(filePath);
-        return ig.add(this.readIgnoreFile(filePath));
+        this
+            .readIgnoreFile(filePath)
+            .forEach(ignoreRule => this.addPatternRelativeToIgnoreFile(ig, ignoreRule));
     }
 
     /**
@@ -243,7 +328,7 @@ class IgnoredPaths {
 
         let result = false;
         const absolutePath = path.resolve(this.options.cwd, filepath);
-        const relativePath = pathUtil.getRelativePath(absolutePath, this.baseDir);
+        const relativePath = pathUtils.getRelativePath(absolutePath, this.getBaseDir());
 
         if (typeof category === "undefined") {
             result = (this.ig.default.filter([relativePath]).length === 0) ||
@@ -251,6 +336,9 @@ class IgnoredPaths {
         } else {
             result = (this.ig[category].filter([relativePath]).length === 0);
         }
+        debug("contains:");
+        debug("  target = %j", filepath);
+        debug("  result = %j", result);
 
         return result;
 
@@ -261,13 +349,15 @@ class IgnoredPaths {
      * @returns {function()} method to check whether a folder should be ignored by glob.
      */
     getIgnoredFoldersGlobChecker() {
+        const baseDir = this.getBaseDir();
+        const ig = ignore();
 
-        const ig = ignore().add(DEFAULT_IGNORE_DIRS);
+        DEFAULT_IGNORE_DIRS.forEach(ignoreDir => this.addPatternRelativeToCwd(ig, ignoreDir));
 
         if (this.options.dotfiles !== true) {
 
             // Ignore hidden folders.  (This cannot be ".*", or else it's not possible to unignore hidden files)
-            ig.add([".*/*", "!../"]);
+            ig.add([".*/*", "!../*"]);
         }
 
         if (this.options.ignore) {
@@ -276,10 +366,8 @@ class IgnoredPaths {
 
         const filter = ig.createFilter();
 
-        const base = this.baseDir;
-
         return function(absolutePath) {
-            const relative = pathUtil.getRelativePath(absolutePath, base);
+            const relative = pathUtils.getRelativePath(absolutePath, baseDir);
 
             if (!relative) {
                 return false;

tools/node_modules/eslint/lib/linter.js

@@ -25,7 +25,7 @@ const eslintScope = require("eslint-scope"),
     createReportTranslator = require("./report-translator"),
     Rules = require("./rules"),
     timing = require("./util/timing"),
-    astUtils = require("./ast-utils"),
+    astUtils = require("./util/ast-utils"),
     pkg = require("../package.json"),
     SourceCodeFixer = require("./util/source-code-fixer");
 

tools/node_modules/eslint/lib/rules/array-bracket-newline.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/array-bracket-spacing.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/array-callback-return.js

@@ -11,7 +11,7 @@
 
 const lodash = require("lodash");
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/array-element-newline.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/arrow-body-style.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/arrow-parens.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/arrow-spacing.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/block-spacing.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const util = require("../ast-utils");
+const util = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/brace-style.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/capitalized-comments.js

@@ -9,7 +9,7 @@
 //------------------------------------------------------------------------------
 
 const LETTER_PATTERN = require("../util/patterns/letters");
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/comma-dangle.js

@@ -10,7 +10,7 @@
 //------------------------------------------------------------------------------
 
 const lodash = require("lodash");
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/comma-spacing.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/comma-style.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/complexity.js

@@ -12,7 +12,7 @@
 
 const lodash = require("lodash");
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/computed-property-spacing.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/consistent-return.js

@@ -10,7 +10,7 @@
 
 const lodash = require("lodash");
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/curly.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/dot-location.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/dot-notation.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/eqeqeq.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/func-call-spacing.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/func-name-matching.js

@@ -9,7 +9,7 @@
 // Requirements
 //--------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 const esutils = require("esutils");
 
 //--------------------------------------------------------------------------

tools/node_modules/eslint/lib/rules/func-names.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 /**
  * Checks whether or not a given variable is a function name.

tools/node_modules/eslint/lib/rules/function-paren-newline.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/getter-return.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/indent-legacy.js

@@ -12,7 +12,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/indent.js

@@ -1,5 +1,5 @@
 /**
- * @fileoverview This option sets a specific tab width for your code
+ * @fileoverview This rule sets a specific indentation style and width for your code
  *
  * @author Teddy Katz
  * @author Vitaly Puzrin
@@ -13,7 +13,7 @@
 //------------------------------------------------------------------------------
 
 const lodash = require("lodash");
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 const createTree = require("functional-red-black-tree");
 
 //------------------------------------------------------------------------------
@@ -855,7 +855,11 @@ module.exports = {
                         previousElement &&
                         previousElementLastToken.loc.end.line - countTrailingLinebreaks(previousElementLastToken.value) > startToken.loc.end.line
                     ) {
-                        offsets.setDesiredOffsets(element.range, firstTokenOfPreviousElement, 0);
+                        offsets.setDesiredOffsets(
+                            [previousElement.range[1], element.range[1]],
+                            firstTokenOfPreviousElement,
+                            0
+                        );
                     }
                 }
             });
@@ -997,6 +1001,31 @@ module.exports = {
             return !node || node.loc.start.line === token.loc.start.line;
         }
 
+        /**
+         * Check whether there are any blank (whitespace-only) lines between
+         * two tokens on separate lines.
+         * @param {Token} firstToken The first token.
+         * @param {Token} secondToken The second token.
+         * @returns {boolean} `true` if the tokens are on separate lines and
+         *   there exists a blank line between them, `false` otherwise.
+         */
+        function hasBlankLinesBetween(firstToken, secondToken) {
+            const firstTokenLine = firstToken.loc.end.line;
+            const secondTokenLine = secondToken.loc.start.line;
+
+            if (firstTokenLine === secondTokenLine || firstTokenLine === secondTokenLine - 1) {
+                return false;
+            }
+
+            for (let line = firstTokenLine + 1; line < secondTokenLine; ++line) {
+                if (!tokenInfo.firstTokensByLineNumber.has(line)) {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
         const ignoredNodeFirstTokens = new Set();
 
         const baseOffsetListeners = {
@@ -1536,10 +1565,13 @@ module.exports = {
                             const tokenBefore = precedingTokens.get(firstTokenOfLine);
                             const tokenAfter = tokenBefore ? sourceCode.getTokenAfter(tokenBefore) : sourceCode.ast.tokens[0];
 
+                            const mayAlignWithBefore = tokenBefore && !hasBlankLinesBetween(tokenBefore, firstTokenOfLine);
+                            const mayAlignWithAfter = tokenAfter && !hasBlankLinesBetween(firstTokenOfLine, tokenAfter);
+
                             // If a comment matches the expected indentation of the token immediately before or after, don't report it.
                             if (
-                                tokenBefore && validateTokenIndent(firstTokenOfLine, offsets.getDesiredIndent(tokenBefore)) ||
-                                tokenAfter && validateTokenIndent(firstTokenOfLine, offsets.getDesiredIndent(tokenAfter))
+                                mayAlignWithBefore && validateTokenIndent(firstTokenOfLine, offsets.getDesiredIndent(tokenBefore)) ||
+                                mayAlignWithAfter && validateTokenIndent(firstTokenOfLine, offsets.getDesiredIndent(tokenAfter))
                             ) {
                                 return;
                             }

tools/node_modules/eslint/lib/rules/jsx-quotes.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Constants

tools/node_modules/eslint/lib/rules/key-spacing.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers
@@ -540,7 +540,7 @@ module.exports = {
             const length = properties.length,
                 widths = properties.map(getKeyWidth), // Width of keys, including quotes
                 align = alignmentOptions.on; // "value" or "colon"
-            let targetWidth = Math.max.apply(null, widths),
+            let targetWidth = Math.max(...widths),
                 beforeColon, afterColon, mode;
 
             if (alignmentOptions && length > 1) { // When aligning values within a group, use the alignment configuration.

tools/node_modules/eslint/lib/rules/keyword-spacing.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils"),
+const astUtils = require("../util/ast-utils"),
     keywords = require("../util/keywords");
 
 //------------------------------------------------------------------------------

tools/node_modules/eslint/lib/rules/line-comment-position.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition
@@ -59,7 +59,7 @@ module.exports = {
             above = !options || options === "above";
 
         } else {
-            above = options.position === "above";
+            above = !options.position || options.position === "above";
             ignorePattern = options.ignorePattern;
 
             if (options.hasOwnProperty("applyDefaultIgnorePatterns")) {

tools/node_modules/eslint/lib/rules/linebreak-style.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/lines-around-comment.js

@@ -9,7 +9,7 @@
 //------------------------------------------------------------------------------
 
 const lodash = require("lodash"),
-    astUtils = require("../ast-utils");
+    astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/lines-around-directive.js

@@ -6,7 +6,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/lines-between-class-members.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/max-len.js

@@ -266,7 +266,7 @@ module.exports = {
                 // list of comments to ignore
                 comments = ignoreComments || maxCommentLength || ignoreTrailingComments ? sourceCode.getAllComments() : [];
 
-                // we iterate over comments in parallel with the lines
+            // we iterate over comments in parallel with the lines
             let commentsIndex = 0;
 
             const strings = getAllStrings();

tools/node_modules/eslint/lib/rules/max-lines-per-function.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Constants

tools/node_modules/eslint/lib/rules/max-lines.js

@@ -9,7 +9,7 @@
 //------------------------------------------------------------------------------
 
 const lodash = require("lodash");
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/max-params.js

@@ -11,7 +11,7 @@
 
 const lodash = require("lodash");
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/max-statements-per-line.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/max-statements.js

@@ -11,7 +11,7 @@
 
 const lodash = require("lodash");
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/multiline-comment-style.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/multiline-ternary.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/new-parens.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/newline-after-var.js

@@ -10,7 +10,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/newline-per-chained-call.js

@@ -6,7 +6,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-alert.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const getPropertyName = require("../ast-utils").getStaticPropertyName;
+const getPropertyName = require("../util/ast-utils").getStaticPropertyName;
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-async-promise-executor.js

@@ -0,0 +1,33 @@
+/**
+ * @fileoverview disallow using an async function as a Promise executor
+ * @author Teddy Katz
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow using an async function as a Promise executor",
+            category: "Possible Errors",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/no-async-promise-executor"
+        },
+        fixable: null,
+        schema: []
+    },
+
+    create(context) {
+        return {
+            "NewExpression[callee.name='Promise'][arguments.0.async=true]"(node) {
+                context.report({
+                    node: context.getSourceCode().getFirstToken(node.arguments[0], token => token.value === "async"),
+                    message: "Promise executor functions should not be async."
+                });
+            }
+        };
+    }
+};

tools/node_modules/eslint/lib/rules/no-catch-shadow.js

@@ -10,7 +10,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-class-assign.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-cond-assign.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 const NODE_DESCRIPTIONS = {
     DoWhileStatement: "a 'do...while' statement",

tools/node_modules/eslint/lib/rules/no-confusing-arrow.js

@@ -6,7 +6,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils.js");
+const astUtils = require("../util/ast-utils.js");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-console.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-const-assign.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-dupe-keys.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-else-return.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 const FixTracker = require("../util/fix-tracker");
 
 //------------------------------------------------------------------------------

tools/node_modules/eslint/lib/rules/no-empty-function.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-empty.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-eval.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-ex-assign.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-extend-native.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 const globals = require("globals");
 
 //------------------------------------------------------------------------------

tools/node_modules/eslint/lib/rules/no-extra-bind.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-extra-boolean-cast.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-extra-label.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-extra-parens.js

@@ -8,7 +8,7 @@
 // Rule Definition
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils.js");
+const astUtils = require("../util/ast-utils.js");
 
 module.exports = {
     meta: {

tools/node_modules/eslint/lib/rules/no-extra-semi.js

@@ -10,7 +10,7 @@
 //------------------------------------------------------------------------------
 
 const FixTracker = require("../util/fix-tracker");
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-floating-decimal.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-func-assign.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-implicit-coercion.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-inline-comments.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-invalid-this.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-irregular-whitespace.js

@@ -10,7 +10,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Constants

tools/node_modules/eslint/lib/rules/no-label-var.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-labels.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-misleading-character-class.js

@@ -0,0 +1,189 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+"use strict";
+
+const { CALL, CONSTRUCT, ReferenceTracker, getStringIfConstant } = require("eslint-utils");
+const { RegExpParser, visitRegExpAST } = require("regexpp");
+const { isCombiningCharacter, isEmojiModifier, isRegionalIndicatorSymbol, isSurrogatePair } = require("../util/unicode");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Iterate character sequences of a given nodes.
+ *
+ * CharacterClassRange syntax can steal a part of character sequence,
+ * so this function reverts CharacterClassRange syntax and restore the sequence.
+ *
+ * @param {regexpp.AST.CharacterClassElement[]} nodes The node list to iterate character sequences.
+ * @returns {IterableIterator<number[]>} The list of character sequences.
+ */
+function *iterateCharacterSequence(nodes) {
+    let seq = [];
+
+    for (const node of nodes) {
+        switch (node.type) {
+            case "Character":
+                seq.push(node.value);
+                break;
+
+            case "CharacterClassRange":
+                seq.push(node.min.value);
+                yield seq;
+                seq = [node.max.value];
+                break;
+
+            case "CharacterSet":
+                if (seq.length > 0) {
+                    yield seq;
+                    seq = [];
+                }
+                break;
+
+            // no default
+        }
+    }
+
+    if (seq.length > 0) {
+        yield seq;
+    }
+}
+
+const hasCharacterSequence = {
+    surrogatePairWithoutUFlag(chars) {
+        return chars.some((c, i) => i !== 0 && isSurrogatePair(chars[i - 1], c));
+    },
+
+    combiningClass(chars) {
+        return chars.some((c, i) => (
+            i !== 0 &&
+            isCombiningCharacter(c) &&
+            !isCombiningCharacter(chars[i - 1])
+        ));
+    },
+
+    emojiModifier(chars) {
+        return chars.some((c, i) => (
+            i !== 0 &&
+            isEmojiModifier(c) &&
+            !isEmojiModifier(chars[i - 1])
+        ));
+    },
+
+    regionalIndicatorSymbol(chars) {
+        return chars.some((c, i) => (
+            i !== 0 &&
+            isRegionalIndicatorSymbol(c) &&
+            isRegionalIndicatorSymbol(chars[i - 1])
+        ));
+    },
+
+    zwj(chars) {
+        const lastIndex = chars.length - 1;
+
+        return chars.some((c, i) => (
+            i !== 0 &&
+            i !== lastIndex &&
+            c === 0x200d &&
+            chars[i - 1] !== 0x200d &&
+            chars[i + 1] !== 0x200d
+        ));
+    }
+};
+
+const kinds = Object.keys(hasCharacterSequence);
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow characters which are made with multiple code points in character class syntax",
+            category: "Possible Errors",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/no-misleading-character-class"
+        },
+        schema: [],
+        messages: {
+            surrogatePairWithoutUFlag: "Unexpected surrogate pair in character class. Use 'u' flag.",
+            combiningClass: "Unexpected combined character in character class.",
+            emojiModifier: "Unexpected modified Emoji in character class.",
+            regionalIndicatorSymbol: "Unexpected national flag in character class.",
+            zwj: "Unexpected joined character sequence in character class."
+        }
+    },
+    create(context) {
+        const parser = new RegExpParser();
+
+        /**
+         * Verify a given regular expression.
+         * @param {Node} node The node to report.
+         * @param {string} pattern The regular expression pattern to verify.
+         * @param {string} flags The flags of the regular expression.
+         * @returns {void}
+         */
+        function verify(node, pattern, flags) {
+            const patternNode = parser.parsePattern(
+                pattern,
+                0,
+                pattern.length,
+                flags.includes("u")
+            );
+            const has = {
+                surrogatePairWithoutUFlag: false,
+                combiningClass: false,
+                variationSelector: false,
+                emojiModifier: false,
+                regionalIndicatorSymbol: false,
+                zwj: false
+            };
+
+            visitRegExpAST(patternNode, {
+                onCharacterClassEnter(ccNode) {
+                    for (const chars of iterateCharacterSequence(ccNode.elements)) {
+                        for (const kind of kinds) {
+                            has[kind] = has[kind] || hasCharacterSequence[kind](chars);
+                        }
+                    }
+                }
+            });
+
+            for (const kind of kinds) {
+                if (has[kind]) {
+                    context.report({ node, messageId: kind });
+                }
+            }
+        }
+
+        return {
+            "Literal[regex]"(node) {
+                verify(node, node.regex.pattern, node.regex.flags);
+            },
+            "Program"() {
+                const scope = context.getScope();
+                const tracker = new ReferenceTracker(scope);
+
+                /*
+                 * Iterate calls of RegExp.
+                 * E.g., `new RegExp()`, `RegExp()`, `new window.RegExp()`,
+                 *       `const {RegExp: a} = window; new a()`, etc...
+                 */
+                for (const { node } of tracker.iterateGlobalReferences({
+                    RegExp: { [CALL]: true, [CONSTRUCT]: true }
+                })) {
+                    const [patternNode, flagsNode] = node.arguments;
+                    const pattern = getStringIfConstant(patternNode, scope);
+                    const flags = getStringIfConstant(flagsNode, scope);
+
+                    if (typeof pattern === "string") {
+                        verify(node, pattern, flags || "");
+                    }
+                }
+            }
+        };
+    }
+};

tools/node_modules/eslint/lib/rules/no-mixed-operators.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils.js");
+const astUtils = require("../util/ast-utils.js");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-multi-spaces.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-multi-str.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-regex-spaces.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-restricted-properties.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-return-assign.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-return-await.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-self-assign.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-sequences.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-shadow.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-this-before-super.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers

tools/node_modules/eslint/lib/rules/no-throw-literal.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-trailing-spaces.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-undef-init.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-unexpected-multiline.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

tools/node_modules/eslint/lib/rules/no-unmodified-loop-condition.js

@@ -10,13 +10,12 @@
 //------------------------------------------------------------------------------
 
 const Traverser = require("../util/traverser"),
-    astUtils = require("../ast-utils");
+    astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers
 //------------------------------------------------------------------------------
 
-const pushAll = Function.apply.bind(Array.prototype.push);
 const SENTINEL_PATTERN = /(?:(?:Call|Class|Function|Member|New|Yield)Expression|Statement|Declaration)$/;
 const LOOP_PATTERN = /^(?:DoWhile|For|While)Statement$/; // for-in/of statements don't have `test` property.
 const GROUP_PATTERN = /^(?:BinaryExpression|ConditionalExpression)$/;
@@ -356,7 +355,7 @@ module.exports = {
                 let scope;
 
                 while ((scope = queue.pop())) {
-                    pushAll(queue, scope.childScopes);
+                    queue.push(...scope.childScopes);
                     scope.variables.forEach(checkReferences);
                 }
 

tools/node_modules/eslint/lib/rules/no-unneeded-ternary.js

@@ -5,7 +5,7 @@
 
 "use strict";
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 // Operators that always result in a boolean value
 const BOOLEAN_OPERATORS = new Set(["==", "===", "!=", "!==", ">", ">=", "<", "<=", "in", "instanceof"]);

tools/node_modules/eslint/lib/rules/no-unsafe-negation.js

@@ -9,7 +9,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const astUtils = require("../ast-utils");
+const astUtils = require("../util/ast-utils");
 
 //------------------------------------------------------------------------------
 // Helpers