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* [Bug libstdc++/47724] New: Regex string anchors cause segfault
@ 2011-02-13 23:27 naddiseo at gmail dot com
2011-02-14 0:00 ` [Bug libstdc++/47724] " paolo.carlini at oracle dot com
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: naddiseo at gmail dot com @ 2011-02-13 23:27 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47724
Summary: Regex string anchors cause segfault
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: naddiseo@gmail.com
Created attachment 23329
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23329
Test case
Using the regex anchors "^" or "$" cause a segfault.
$ /usr/lib/gcc-snapshot/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/lib/gcc-snapshot/bin/gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/4.6.0/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
20101004-0ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs
--enable-languages=c,ada,c++,fortran,objc,obj-c++
--prefix=/usr/lib/gcc-snapshot --enable-shared --enable-multiarch
--enable-linker-build-id --with-system-zlib --disable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-plugin --enable-gold --with-plugin-ld=ld.gold --enable-objc-gc
--disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=yes
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.0 20101004 (experimental) [trunk revision 164952] (Ubuntu
20101004-0ubuntu1)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug libstdc++/47724] Regex string anchors cause segfault
2011-02-13 23:27 [Bug libstdc++/47724] New: Regex string anchors cause segfault naddiseo at gmail dot com
@ 2011-02-14 0:00 ` paolo.carlini at oracle dot com
2011-02-14 0:07 ` [Bug libstdc++/47724] [C++0x] " redi at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: paolo.carlini at oracle dot com @ 2011-02-14 0:00 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47724
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jwakely.gcc at gmail dot
| |com
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-02-13 23:36:10 UTC ---
Note, regex is work in progress, I don't know if this is supposed to work or
not. Let's ask Jon...
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug libstdc++/47724] [C++0x] Regex string anchors cause segfault
2011-02-13 23:27 [Bug libstdc++/47724] New: Regex string anchors cause segfault naddiseo at gmail dot com
2011-02-14 0:00 ` [Bug libstdc++/47724] " paolo.carlini at oracle dot com
@ 2011-02-14 0:07 ` redi at gcc dot gnu.org
2011-02-14 0:40 ` paolo.carlini at oracle dot com
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: redi at gcc dot gnu.org @ 2011-02-14 0:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47724
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011.02.14 00:00:37
Summary|Regex string anchors cause |[C++0x] Regex string
|segfault |anchors cause segfault
Ever Confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-02-14 00:00:37 UTC ---
I think that code's meant to support some basic operations, so the fact it
crashes is definitely a bug. We access an empty std::stack in
_Compiler::_M_alternative, I'll see if I can fix it.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug libstdc++/47724] [C++0x] Regex string anchors cause segfault
2011-02-13 23:27 [Bug libstdc++/47724] New: Regex string anchors cause segfault naddiseo at gmail dot com
2011-02-14 0:00 ` [Bug libstdc++/47724] " paolo.carlini at oracle dot com
2011-02-14 0:07 ` [Bug libstdc++/47724] [C++0x] " redi at gcc dot gnu.org
@ 2011-02-14 0:40 ` paolo.carlini at oracle dot com
2011-02-14 20:56 ` redi at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: paolo.carlini at oracle dot com @ 2011-02-14 0:40 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47724
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-02-14 00:11:06 UTC ---
Thanks Jon.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug libstdc++/47724] [C++0x] Regex string anchors cause segfault
2011-02-13 23:27 [Bug libstdc++/47724] New: Regex string anchors cause segfault naddiseo at gmail dot com
` (2 preceding siblings ...)
2011-02-14 0:40 ` paolo.carlini at oracle dot com
@ 2011-02-14 20:56 ` redi at gcc dot gnu.org
2011-02-17 1:50 ` redi at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: redi at gcc dot gnu.org @ 2011-02-14 20:56 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47724
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
AssignedTo|unassigned at gcc dot |redi at gcc dot gnu.org
|gnu.org |
Target Milestone|--- |4.6.0
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-02-14 20:45:57 UTC ---
mine
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug libstdc++/47724] [C++0x] Regex string anchors cause segfault
2011-02-13 23:27 [Bug libstdc++/47724] New: Regex string anchors cause segfault naddiseo at gmail dot com
` (3 preceding siblings ...)
2011-02-14 20:56 ` redi at gcc dot gnu.org
@ 2011-02-17 1:50 ` redi at gcc dot gnu.org
2011-02-17 1:56 ` redi at gcc dot gnu.org
2011-02-17 2:57 ` redi at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: redi at gcc dot gnu.org @ 2011-02-17 1:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47724
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-02-17 01:47:25 UTC ---
Author: redi
Date: Thu Feb 17 01:47:21 2011
New Revision: 170236
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170236
Log:
2011-02-17 Jonathan Wakely <jwakely.gcc@gmail.com>
PR libstdc++/47724
* include/bits/regex_compiler.h (_Scanner::_M_advance): Do not treat
line anchors as metacharacters.
* testsuite/28_regex/basic_regex/ctors/47724.cc: New.
Added:
trunk/libstdc++-v3/testsuite/28_regex/basic_regex/ctors/47724.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/regex_compiler.h
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug libstdc++/47724] [C++0x] Regex string anchors cause segfault
2011-02-13 23:27 [Bug libstdc++/47724] New: Regex string anchors cause segfault naddiseo at gmail dot com
` (4 preceding siblings ...)
2011-02-17 1:50 ` redi at gcc dot gnu.org
@ 2011-02-17 1:56 ` redi at gcc dot gnu.org
2011-02-17 2:57 ` redi at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: redi at gcc dot gnu.org @ 2011-02-17 1:56 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47724
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-02-17 01:55:05 UTC ---
I've checked in a change which prevents the crash, but only by treating line
anchors as non-metacharacters. Unfortunately our regex implementation is
incomplete, but this is better than crashing
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug libstdc++/47724] [C++0x] Regex string anchors cause segfault
2011-02-13 23:27 [Bug libstdc++/47724] New: Regex string anchors cause segfault naddiseo at gmail dot com
` (5 preceding siblings ...)
2011-02-17 1:56 ` redi at gcc dot gnu.org
@ 2011-02-17 2:57 ` redi at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: redi at gcc dot gnu.org @ 2011-02-17 2:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47724
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-02-17 01:56:07 UTC ---
... so fixed
^ permalink raw reply [flat|nested] 8+ messages in thread
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2011-02-13 23:27 [Bug libstdc++/47724] New: Regex string anchors cause segfault naddiseo at gmail dot com
2011-02-14 0:00 ` [Bug libstdc++/47724] " paolo.carlini at oracle dot com
2011-02-14 0:07 ` [Bug libstdc++/47724] [C++0x] " redi at gcc dot gnu.org
2011-02-14 0:40 ` paolo.carlini at oracle dot com
2011-02-14 20:56 ` redi at gcc dot gnu.org
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