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-rw-r--r--gc/default/default.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/gc/default/default.c b/gc/default/default.c
index 1b45d4b724..5664b3dd90 100644
--- a/gc/default/default.c
+++ b/gc/default/default.c
@@ -6006,9 +6006,10 @@ rb_gc_impl_writebarrier(void *objspace_ptr, VALUE a, VALUE b)
if (RGENGC_CHECK_MODE) {
if (SPECIAL_CONST_P(a)) rb_bug("rb_gc_writebarrier: a is special const: %"PRIxVALUE, a);
- if (SPECIAL_CONST_P(b)) rb_bug("rb_gc_writebarrier: b is special const: %"PRIxVALUE, b);
}
+ if (SPECIAL_CONST_P(b)) return;
+
GC_ASSERT(RB_BUILTIN_TYPE(a) != T_NONE);
GC_ASSERT(RB_BUILTIN_TYPE(a) != T_MOVED);
GC_ASSERT(RB_BUILTIN_TYPE(a) != T_ZOMBIE);