From 73b64e141f573e9ddbdc03a5d94dfd4df752cd0d Mon Sep 17 00:00:00 2001
From: Zeex <zeex@rocketmail.com>
Date: Thu, 8 Feb 2018 07:39:07 +0600
Subject: [PATCH] Fix crash when #pragma deprecated message is empty

Fixes #283.
---
 source/compiler/sc2.c                | 2 +-
 source/compiler/tests/CMakeLists.txt | 5 +++++
 source/compiler/tests/gh_283.pwn     | 6 ++++++
 3 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 source/compiler/tests/gh_283.pwn

diff --git a/source/compiler/sc2.c b/source/compiler/sc2.c
index 291d086..5180ae5 100644
--- a/source/compiler/sc2.c
+++ b/source/compiler/sc2.c
@@ -1119,7 +1119,7 @@ static int command(void)
           if (pc_deprecate!=NULL) {
             char *ptr=pc_deprecate+strlen(pc_deprecate)-1;
             /* remove trailing whitespace */
-            while (*ptr<= ' ')
+            while (ptr>=pc_deprecate && *ptr<= ' ')
               *ptr--='\0';
           } else {
             error(103); /* insufficient memory */
diff --git a/source/compiler/tests/CMakeLists.txt b/source/compiler/tests/CMakeLists.txt
index a63fdeb..a341039 100644
--- a/source/compiler/tests/CMakeLists.txt
+++ b/source/compiler/tests/CMakeLists.txt
@@ -40,6 +40,11 @@ set_tests_properties(unused_symbol_line_gh_252 PROPERTIES PASS_REGULAR_EXPRESSIO
 .*\\.pwn\\(1\\) : warning 203: symbol is never used: \\\"x\\\"
 ")
 
+add_compiler_test(gh_283 ${CMAKE_CURRENT_SOURCE_DIR}/gh_283.pwn)
+set_tests_properties(gh_283 PROPERTIES PASS_REGULAR_EXPRESSION "\
+.*\\.pwn\\(5\\) : warning 234: function is deprecated \\(symbol \"print\"\\)\
+")
+
 # Crashers
 #
 # These tests simply check that the compiler doesn't crash.
diff --git a/source/compiler/tests/gh_283.pwn b/source/compiler/tests/gh_283.pwn
new file mode 100644
index 0000000..87645ac
--- /dev/null
+++ b/source/compiler/tests/gh_283.pwn
@@ -0,0 +1,6 @@
+#pragma deprecated
+native print(const string[]);
+
+main() {
+	print("Hello World");
+}