From 90c54d1ead5eeec223d8da0b88ce88d3da9756ff Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Fri, 28 Feb 2014 01:25:50 +0900
Subject: remove break altogether in ci loop

---
 src/gc.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/gc.c b/src/gc.c
index ec6ffba0a..8eda76b26 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -460,13 +460,15 @@ mark_context(mrb_state *mrb, struct mrb_context *c)
   for (i=0; i<e; i++) {
     mrb_gc_mark(mrb, (struct RBasic*)c->ensure[i]);
   }
-  /* mark closure */
-  for (ci = c->cibase; ci <= c->ci; ci++) {
-    if (!ci) break;
-    mrb_gc_mark(mrb, (struct RBasic*)ci->env);
-    mrb_gc_mark(mrb, (struct RBasic*)ci->proc);
-    mrb_gc_mark(mrb, (struct RBasic*)ci->target_class);
+  /* mark VM stack */
+  if (c->cibase) {
+    for (ci = c->cibase; ci <= c->ci; ci++) {
+      mrb_gc_mark(mrb, (struct RBasic*)ci->env);
+      mrb_gc_mark(mrb, (struct RBasic*)ci->proc);
+      mrb_gc_mark(mrb, (struct RBasic*)ci->target_class);
+    }
   }
+  /* mark fibers */
   if (c->prev && c->prev->fib) {
     mrb_gc_mark(mrb, (struct RBasic*)c->prev->fib);
   }
-- 
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