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-rw-r--r--variable.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/variable.c b/variable.c
index 795ee3fb0a..8ac40efe80 100644
--- a/variable.c
+++ b/variable.c
@@ -922,7 +922,8 @@ generic_ivtbl(VALUE obj, ID id, bool force_check_ractor)
{
ASSERT_vm_locking();
- if ((force_check_ractor || rb_is_instance_id(id)) && // not internal ID
+ if ((force_check_ractor || LIKELY(rb_is_instance_id(id)) /* not internal ID */ ) &&
+ !RB_OBJ_FROZEN_RAW(obj) &&
UNLIKELY(!rb_ractor_main_p()) &&
UNLIKELY(rb_ractor_shareable_p(obj))) {
rb_raise(rb_eRuntimeError, "can not access instance variables of shareable objects from non-main Ractors");