1 files changed, 3 insertions, 0 deletions
diff --git a/gc.c b/gc.c
index 20af24f82d..a888d659e3 100644
--- a/gc.c
+++ b/gc.c
@@ -714,6 +714,9 @@ rb_newobj(void)
     rb_objspace_t *objspace = &rb_objspace;
 #endif
 
+    if (during_gc)
+        rb_bug("object allocation during garbage collection phase");
+
     if (v) {
 	RBASIC(v)->flags = 0;
 	th->value_cache_ptr++;