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http://bugs.exim.org/show_bug.cgi?id=969
Philip Hazel <ph10@???> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
--- Comment #1 from Philip Hazel <ph10@???> 2010-05-22 17:19:21 ---
(In reply to comment #0)
> A seg fault occurs in compile_branch when a string starting with "\0277\0377"
> is passed to pcre_compile2 with compile options PCRE_CASELESS |
> PCRE_NO_UTF8_CHECK | PCRE_UTF8.
>
>
> #include "pcre.h"
>
> int main ()
> {
> const char needle[] = {0x5B, 0xFF};
1. You have not terminated the pattern string with a binary zero to make it
into a C string. However, adding one makes no difference.
2. 0x5B is not \0277, it is \0133.
3. The sequence 0x5B, 0xFF is not a valid UTF-8 character. By setting
PCRE_NO_UTF9_CHECK you have told PCRE that you are giving it a valid UTF-8
string. This is a lie, so the consequences are unpredictable. If you do not set
PCRE_NO_UTF8_CHECK, you get the "invalid UTF-8 string" error.
4. The documentation (the pcreapi page) says "If you already know that your
pattern is valid, and you want to skip this check for performance reasons, you
can set the PCRE_NO_UTF8_CHECK option. When it is set, the effect of passing an
invalid UTF-8 string as a pattern is undefined. It may cause your program to
crash."
5. Consequently, I am closing this as INVALID.
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