From 6884cb4de9659895dc1ae4f0196899d3cbfdc6e2 Mon Sep 17 00:00:00 2001
From: Wolfgang Keller <nubok@users.noreply.github.com>
Date: Mon, 21 Aug 2017 23:30:09 +0200
Subject: [PATCH] Avoid undefined behavior - bp is initialized when setting up
 the stack

---
 c4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/c4.c b/c4.c
index 0557046..29e35b1 100644
--- a/c4.c
+++ b/c4.c
@@ -463,7 +463,7 @@ int main(int argc, char **argv)
   if (src) return 0;
 
   // setup stack
-  sp = (int *)((int)sp + poolsz);
+  bp = sp = (int *)((int)sp + poolsz);
   *--sp = EXIT; // call exit if main returns
   *--sp = PSH; t = sp;
   *--sp = argc;