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--- src/lexer.c.orig 2008-03-22 21:06:55 UTC
+++ src/lexer.c
@@ -3467,16 +3467,17 @@ static tmbstr ParseValue( TidyDocImpl* d
/* and prompts attributes unless --literal-attributes is set to yes */
/* #994841 - Whitespace is removed from value attributes */
- if (munge &&
+ /* Issue #217 from tidy-html5 - Also only if/while (len > 0) - MUST NEVER GO NEGATIVE! */
+ if ((len > 0) && munge &&
TY_(tmbstrcasecmp)(name, "alt") &&
TY_(tmbstrcasecmp)(name, "title") &&
TY_(tmbstrcasecmp)(name, "value") &&
TY_(tmbstrcasecmp)(name, "prompt"))
{
- while (TY_(IsWhite)(lexer->lexbuf[start+len-1]))
+ while (TY_(IsWhite)(lexer->lexbuf[start+len-1]) && (len > 0))
--len;
- while (TY_(IsWhite)(lexer->lexbuf[start]) && start < len)
+ while (TY_(IsWhite)(lexer->lexbuf[start]) && (start < len) && (len > 0))
{
++start;
--len;
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