From: Alex Smith <ais523@bham.ac.uk>
Date: Wed, 1 Sep 2010 20:05:00 +0000 (+0100)
Subject: Don't crash on an invalid guessdir
X-Git-Tag: 0.29~75
X-Git-Url: http://thyrsus.com/gitweb/?a=commitdiff_plain;h=14696117cb2b12a498eb19f77c7a60ade72d062e;p=intercal.git

Don't crash on an invalid guessdir
---

diff --git a/src/uncommon.c b/src/uncommon.c
index 946924e..692191a 100644
--- a/src/uncommon.c
+++ b/src/uncommon.c
@@ -54,7 +54,7 @@ int ick_printfopens=0;
   /*@observer@*/ static const char *fileiter;
   size_t i = 0, j;
   FILE* ret;
-  while(*guessdir != '\0' && i<BUFSIZ-2) buf2[i++] = *guessdir++;
+  while(guessdir && *guessdir != '\0' && i<BUFSIZ-2) buf2[i++] = *guessdir++;
   buf2[i++] = '/';
   fileiter = file;
   while(*fileiter != '\0' && i<BUFSIZ-1) buf2[i++] = *fileiter++;
@@ -107,7 +107,7 @@ int ick_printfopens=0;
   /*@observer@*/ static const char *fileiter;
   size_t i = 0, j;
   FILE* ret;
-  while(*guessdir != '\0' && i<BUFSIZ-2) buf2[i++] = *guessdir++;
+  while(guessdir && *guessdir != '\0' && i<BUFSIZ-2) buf2[i++] = *guessdir++;
   buf2[i++] = '/';
   fileiter = file;
   while(*fileiter != '\0' && i<BUFSIZ-1) buf2[i++] = *fileiter++;