[boost] [Boost-bugs] [ boost-Bugs-1526472 ] regex_token_iterator can segfault

From: SourceForge.net (noreply_at_[hidden])
Date: 2006-07-21 09:43:33

Bugs item #1526472, was opened at 2006-07-21 13:43
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Category: regex
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Gianni Ceccarelli (dakkar)
Assigned to: John Maddock (johnmaddock)
Summary: regex_token_iterator can segfault

Initial Comment:
regex_token_iterator and u32regex_token_iterator can
dereference a 0 pointer in the following case:
- iterating over a string with no matches for the split
regexp
- asking for non-matches (the submatches array starts
with -1)
- incrementing the iterator the first time

in the non-unicode version, nothing happens; but in the
unicode version, the underlying u8_to_u32_iterator
causes a segfault.

I'm attaching a small test case, and a (seems working)
patch.

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