From aa4612480424ad2fede0cd4ae4c7a893f61c6c0f Mon Sep 17 00:00:00 2001
From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Fri, 19 Mar 2010 09:41:18 +0100
Subject: Clear local variables in filters and functions.

Fixes crash when used uninitialized variables.
This problem was surprisingly tricky to fix.
---
 filter/config.Y | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'filter/config.Y')

diff --git a/filter/config.Y b/filter/config.Y
index fcbee71..1af5649 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -172,7 +172,14 @@ function_params:
 
 function_body:
    decls '{' cmds '}' {
-     $$ = $3;
+     if ($1) {
+       /* Prepend instruction to clear local variables */
+       $$ = f_new_inst();
+       $$->code = P('c','v');
+       $$->a1.p = $1;
+       $$->next = $3;
+     } else
+       $$ = $3;
    }
  ;
 
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