[svn:parrot] r48884 - trunk/src/string

[NotFound at svn.parrot.org]

Author: NotFound
Date: Thu Sep  9 16:48:49 2010
New Revision: 48884
URL: https://trac.parrot.org/parrot/changeset/48884

Log:
avoid segfaulting in string_rep_compatible is a string has null encoding for some reason, TT #1779

Modified:
   trunk/src/string/api.c

Modified: trunk/src/string/api.c
==============================================================================
--- trunk/src/string/api.c	Thu Sep  9 13:45:02 2010	(r48883)
+++ trunk/src/string/api.c	Thu Sep  9 16:48:49 2010	(r48884)
@@ -261,6 +261,10 @@
         return b->encoding;
     }
 
+    /* Sanity check before dereferencing the encoding pointers */
+    if (a->encoding == NULL || b->encoding == NULL)
+        return NULL;
+
     if (STRING_max_bytes_per_codepoint(a) != 1 ||
         STRING_max_bytes_per_codepoint(b) != 1)
         return NULL;