You shall not pass NULL to IsUTF8().

diff --git a/src/misc/unicode.c b/src/misc/unicode.c
index e5db5797c139501969afc70938dbf67090c54b0c..3e90cbb5daa8b799571393dc2ace8e7d5629d3f6 100644 (file)
--- a/src/misc/unicode.c
+++ b/src/misc/unicode.c
@@ -585,6 +585,8 @@ static char *CheckUTF8( char *str, char rep )
 {
     unsigned char *ptr, c;
 
+    assert (str != NULL);
+
     ptr = (unsigned char *)str;
     while( (c = *ptr) != '\0' )
     {