From dc95b57a68da6999ce6a1542b3ad81c51429cc99 Mon Sep 17 00:00:00 2001
From: Koichi Sasada <ko1@atdot.net>
Date: Thu, 23 May 2019 17:30:53 +0900
Subject: [PATCH] add verifier before compact

---
 gc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gc.c b/gc.c
index 017ea3390a..98fe9bd8d4 100644
--- a/gc.c
+++ b/gc.c
@@ -8188,6 +8188,10 @@ gc_compact_after_gc(rb_objspace_t *objspace, int use_toward_empty, int use_doubl
 {
     if (0) fprintf(stderr, "gc_compact_after_gc: %d,%d,%d\n", use_toward_empty, use_double_pages, use_verifier);
 
+    if (use_verifier) {
+        gc_verify_internal_consistency(Qnil);
+    }
+
     if (use_double_pages) {
         /* Double heap size */
         heap_add_pages(objspace, heap_eden, heap_allocated_pages);