[rubygems/rubygems] Skip unresolved deps warning on Gem::Specification.reset on benign cases

If `Gem::Specification.reset` is used, but there are still unresolved
dependencies, RubyGems prints a warning. There are though, certain cases
where the situation will not cause any issues.

One such case is when the unresolved dependency does not restrict any
versions (>= 0) and there's a default gem matching it.

In this situation, it doesn't matter if Gem paths change, because
default gems are still activatable, so the dependency will be properly
activated if ever needed.

https://github.com/rubygems/rubygems/commit/e5f8a3068e

lib/rubygems/specification.rb

@@ -1199,21 +1199,30 @@ class Gem::Specification < Gem::BasicSpecification
     Gem.pre_reset_hooks.each(&:call)
     @specification_record = nil
     clear_load_cache
-    unresolved = unresolved_deps
-    unless unresolved.empty?
-      warn "WARN: Unresolved or ambiguous specs during Gem::Specification.reset:"
-      unresolved.values.each do |dep|
-        warn "      #{dep}"
 
-        versions = find_all_by_name(dep.name).uniq(&:full_name)
-        unless versions.empty?
-          warn "      Available/installed versions of this gem:"
-          versions.each {|s| warn "      - #{s.version}" }
+    unless unresolved_deps.empty?
+      unresolved = unresolved_deps.filter_map do |name, dep|
+        matching_versions = find_all_by_name(name)
+        next if dep.latest_version? && matching_versions.any?(&:default_gem?)
+
+        [dep, matching_versions.uniq(&:full_name)]
+      end.to_h
+
+      unless unresolved.empty?
+        warn "WARN: Unresolved or ambiguous specs during Gem::Specification.reset:"
+        unresolved.each do |dep, versions|
+          warn "      #{dep}"
+
+          unless versions.empty?
+            warn "      Available/installed versions of this gem:"
+            versions.each {|s| warn "      - #{s.version}" }
+          end
         end
+        warn "WARN: Clearing out unresolved specs. Try 'gem cleanup <gem>'"
+        warn "Please report a bug if this causes problems."
       end
-      warn "WARN: Clearing out unresolved specs. Try 'gem cleanup <gem>'"
-      warn "Please report a bug if this causes problems."
-      unresolved.clear
+
+      unresolved_deps.clear
     end
     Gem.post_reset_hooks.each(&:call)
   end

test/rubygems/test_gem_specification.rb

@@ -3111,6 +3111,26 @@ Please report a bug if this causes problems.
     assert_empty specification.unresolved_deps
   end
 
+  def test_unresolved_specs_with_unrestricted_deps_on_default_gems
+    specification = Gem::Specification.clone
+
+    set_orig specification
+
+    spec = new_default_spec "stringio", "3.1.1"
+
+    specification.instance_variable_set(:@unresolved_deps, { stringio: Gem::Dependency.new("stringio", ">= 0") })
+
+    specification.define_singleton_method(:find_all_by_name) do |_dep_name|
+      [spec]
+    end
+
+    actual_stdout, actual_stderr = capture_output do
+      specification.reset
+    end
+    assert_empty actual_stdout
+    assert_empty actual_stderr
+  end
+
   def test_duplicate_runtime_dependency
     expected = "WARNING: duplicated b dependency [\"~> 3.0\", \"~> 3.0\"]\n"
     out, err = capture_output do