From 41b46ca1ed160a014b004223bdceb45d107fecf9 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Fri, 16 May 2014 00:04:55 +0900
Subject: register<nlocals may not have a local variable name (e.g. a block
 arg); fix #2258

---
 src/codegen.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/codegen.c b/src/codegen.c
index a1564d955..cec0d226f 100644
--- a/src/codegen.c
+++ b/src/codegen.c
@@ -2503,7 +2503,12 @@ scope_new(mrb_state *mrb, codegen_scope *prev, node *lv)
     p->irep->lv = (struct mrb_locals*)mrb_malloc(mrb, sizeof(struct mrb_locals) * (p->nlocals - 1));
     for (i=0, n=lv; n; i++,n=n->cdr) {
       p->irep->lv[i].name = lv_name(n);
-      p->irep->lv[i].r = lv_idx(p, lv_name(n));
+      if (lv_name(n)) {
+        p->irep->lv[i].r = lv_idx(p, lv_name(n));
+      }
+      else {
+        p->irep->lv[i].r = 0;
+      }
     }
     mrb_assert(i + 1 == p->nlocals);
   }
-- 
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