From cbfa2b3588732f41669a532f5070cd87cf270319 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Tue, 5 Sep 2017 21:13:16 +0900
Subject: Avoid recursion from `mark_context()`.

---
 src/gc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/gc.c b/src/gc.c
index d602bfb70..1e7ff5f5a 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -582,6 +582,7 @@ mark_context(mrb_state *mrb, struct mrb_context *c)
   int i;
   mrb_callinfo *ci;
 
+ start:
   if (c->status == MRB_FIBER_TERMINATED) return;
 
   /* mark VM stack */
@@ -603,7 +604,8 @@ mark_context(mrb_state *mrb, struct mrb_context *c)
   /* mark fibers */
   mrb_gc_mark(mrb, (struct RBasic*)c->fib);
   if (c->prev) {
-    mark_context(mrb, c->prev);
+    c = c->prev;
+    goto start;
   }
 }
 
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