* vm_insnhelper.c (rb_vm_rewrite_cref_stack): copy nd_refinements

  of orignal crefs. It fixes segmentation fault when calling
  refined method in duplicate module. [ruby-dev:48878] [Bug #10885]

* vm_core.h, class.c: change accordingly.

* test/ruby/test_refinement.rb: add a test for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49685 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/vm_core.h b/vm_core.h
index 8fd8ef4c72..6ab17e0dfc 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -1003,6 +1003,8 @@ void rb_gc_mark_machine_stack(rb_thread_t *th);
 
 int rb_autoloading_value(VALUE mod, ID id, VALUE* value);
 
+void rb_vm_rewrite_cref_stack(NODE *node, VALUE old_klass, VALUE new_klass, NODE **new_cref_ptr);
+
 #define sysstack_error GET_VM()->special_exceptions[ruby_error_sysstack]
 
 #define RUBY_CONST_ASSERT(expr) (1/!!(expr)) /* expr must be a compile-time constant */