1 files changed, 1 insertions, 1 deletions
diff --git a/vm.c b/vm.c
index 5bf684237e..2bb050d19e 100644
--- a/vm.c
+++ b/vm.c
@@ -1486,7 +1486,7 @@ thread_free(void *ptr)
 	}
 #endif
 
-	if (th->vm->main_thread == th) {
+	if (th->vm && th->vm->main_thread == th) {
 	    RUBY_GC_INFO("main thread\n");
 	}
 	else {