From 183fb961b313ab5dc6bcb15c952c34a1aa842fb7 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 20 Aug 2019 07:19:43 +0900
Subject: Fixed a bug in the `OP_JMPNOT` optimization (13eaff4); fix #4644

---
 mrbgems/mruby-compiler/core/codegen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index 36367f656..d397ace8c 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -1578,7 +1578,7 @@ codegen(codegen_scope *s, node *tree, int val)
       }
       codegen(s, tree->car, VAL);
       pop();
-      if (tree->cdr->car) {
+      if (val || tree->cdr->car) {
         pos1 = genjmp2(s, OP_JMPNOT, cursp(), 0, val);
         codegen(s, tree->cdr->car, val);
         if (elsepart) {
-- 
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