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-rw-r--r--class.c3
-rw-r--r--test/ruby/test_module.rb9
2 files changed, 10 insertions, 2 deletions
diff --git a/class.c b/class.c
index 9739aadc73..280ca8e97d 100644
--- a/class.c
+++ b/class.c
@@ -1054,8 +1054,7 @@ rb_include_module(VALUE klass, VALUE module)
if (RB_TYPE_P(klass, T_MODULE)) {
rb_subclass_entry_t *iclass = RCLASS_SUBCLASSES(klass);
// skip the placeholder subclass entry at the head of the list
- if (iclass && iclass->next) {
- RUBY_ASSERT(!iclass->klass);
+ if (iclass && !iclass->klass) {
iclass = iclass->next;
}
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 0a6959c5e6..e744121718 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -475,6 +475,15 @@ class TestModule < Test::Unit::TestCase
assert_not_include(mod.ancestor_list, BasicObject)
end
+ def test_module_collected_extended_object
+ m1 = labeled_module("m1")
+ m2 = labeled_module("m2")
+ Object.new.extend(m1)
+ GC.start
+ m1.include(m2)
+ assert_equal([m1, m2], m1.ancestors)
+ end
+
def test_dup
OtherSetup.call