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* [Bug c++/55497] New: Local array (char[]) initialized with a size taken from a static variable creates an ICE
@ 2012-11-27 21:32 greg.burri at gmail dot com
2012-11-27 21:40 ` [Bug c++/55497] " paolo.carlini at oracle dot com
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: greg.burri at gmail dot com @ 2012-11-27 21:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55497
Bug #: 55497
Summary: Local array (char[]) initialized with a size taken
from a static variable creates an ICE
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: greg.burri@gmail.com
The following lines (41+42) crashes GCC 4.7.2 with an "internal compiler error:
Segmentation fault" message:
https://github.com/Ummon/D-LAN/blob/1.1.0beta13/application/Core/FileManager/priv/Cache/DataWriter.cpp#L42
If the lines are rewritten as this, it compiles without crashing (obviously):
static const quint32 BUFFER_SIZE = 42;
char buffer[BUFFER_SIZE];
It compiles well with GCC 4.6.2
Command line and GCC 4.7.2 message:
make[1]: Entering directory `/home/gburri/D-LAN/application/Core/FileManager'
g++ -c -pipe -std=c++0x -g -fPIC -Wall -Wno-parentheses -D_REENTRANT
-DQT_WEBKIT -DDEBUG -DFILEMANAGER_LIBRARY -DQT_NETWORK_LIB -DQT_CORE_LIB
-DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore
-I/usr/include/qt4/QtNetwork -I/usr/include/qt4 -I. -I../.. -I.tmp/debug -o
.tmp/debug/DataWriter.o priv/Cache/DataWriter.cpp
priv/Cache/DataWriter.cpp: In constructor
'FM::DataWriter::DataWriter(FM::Chunk&)':
priv/Cache/DataWriter.cpp:62:1: internal compiler error: Segmentation fault
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/55497] Local array (char[]) initialized with a size taken from a static variable creates an ICE
2012-11-27 21:32 [Bug c++/55497] New: Local array (char[]) initialized with a size taken from a static variable creates an ICE greg.burri at gmail dot com
@ 2012-11-27 21:40 ` paolo.carlini at oracle dot com
2012-11-27 22:28 ` greg.burri at gmail dot com
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-11-27 21:40 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55497
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2012-11-27
Ever Confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-27 21:39:50 UTC ---
Please attach a self contained (and minimized) testcase, per the bug reporting
instructions.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/55497] Local array (char[]) initialized with a size taken from a static variable creates an ICE
2012-11-27 21:32 [Bug c++/55497] New: Local array (char[]) initialized with a size taken from a static variable creates an ICE greg.burri at gmail dot com
2012-11-27 21:40 ` [Bug c++/55497] " paolo.carlini at oracle dot com
@ 2012-11-27 22:28 ` greg.burri at gmail dot com
2012-11-27 22:28 ` greg.burri at gmail dot com
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: greg.burri at gmail dot com @ 2012-11-27 22:28 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55497
--- Comment #2 from Greg Burri <greg.burri at gmail dot com> 2012-11-27 22:27:58 UTC ---
Created attachment 28801
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28801
To segfault GCC 4.7.2 with '-g' arg
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/55497] Local array (char[]) initialized with a size taken from a static variable creates an ICE
2012-11-27 21:32 [Bug c++/55497] New: Local array (char[]) initialized with a size taken from a static variable creates an ICE greg.burri at gmail dot com
2012-11-27 21:40 ` [Bug c++/55497] " paolo.carlini at oracle dot com
2012-11-27 22:28 ` greg.burri at gmail dot com
@ 2012-11-27 22:28 ` greg.burri at gmail dot com
2012-11-27 22:31 ` greg.burri at gmail dot com
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: greg.burri at gmail dot com @ 2012-11-27 22:28 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55497
--- Comment #3 from Greg Burri <greg.burri at gmail dot com> 2012-11-27 22:28:24 UTC ---
Here we go, I attached the cpp file, just use this command line:
g++ -g gcc_crash.cpp
It compiles without issue if I omit the '-g' argument. It crashes on Ubuntu
12.10 and with mingw under Windows 7 both with GCC 4.7.2.
It takes me one hour to find the origin...
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/55497] Local array (char[]) initialized with a size taken from a static variable creates an ICE
2012-11-27 21:32 [Bug c++/55497] New: Local array (char[]) initialized with a size taken from a static variable creates an ICE greg.burri at gmail dot com
` (2 preceding siblings ...)
2012-11-27 22:28 ` greg.burri at gmail dot com
@ 2012-11-27 22:31 ` greg.burri at gmail dot com
2012-11-27 23:42 ` paolo.carlini at oracle dot com
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: greg.burri at gmail dot com @ 2012-11-27 22:31 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55497
--- Comment #4 from Greg Burri <greg.burri at gmail dot com> 2012-11-27 22:31:05 UTC ---
Actually the template is useless, the main point is this code put in a
constructor:
static const int v = get(1);
char BUFFER[v];
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/55497] Local array (char[]) initialized with a size taken from a static variable creates an ICE
2012-11-27 21:32 [Bug c++/55497] New: Local array (char[]) initialized with a size taken from a static variable creates an ICE greg.burri at gmail dot com
` (3 preceding siblings ...)
2012-11-27 22:31 ` greg.burri at gmail dot com
@ 2012-11-27 23:42 ` paolo.carlini at oracle dot com
2012-11-28 10:50 ` paolo at gcc dot gnu.org
2012-11-28 10:51 ` paolo.carlini at oracle dot com
6 siblings, 0 replies; 8+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-11-27 23:42 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55497
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-27 23:42:14 UTC ---
Thanks a lot.
I can reproduce the issue with 4.7.2 but it's already fixed in current
4_7-branch and mainline. Thus I mean to add the testcase and close the PR.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/55497] Local array (char[]) initialized with a size taken from a static variable creates an ICE
2012-11-27 21:32 [Bug c++/55497] New: Local array (char[]) initialized with a size taken from a static variable creates an ICE greg.burri at gmail dot com
` (4 preceding siblings ...)
2012-11-27 23:42 ` paolo.carlini at oracle dot com
@ 2012-11-28 10:50 ` paolo at gcc dot gnu.org
2012-11-28 10:51 ` paolo.carlini at oracle dot com
6 siblings, 0 replies; 8+ messages in thread
From: paolo at gcc dot gnu.org @ 2012-11-28 10:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55497
--- Comment #6 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2012-11-28 10:49:44 UTC ---
Author: paolo
Date: Wed Nov 28 10:49:39 2012
New Revision: 193885
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193885
Log:
2012-11-28 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/55497
* g++.dg/init/pr55497.C: New.
Added:
trunk/gcc/testsuite/g++.dg/init/pr55497.C
Modified:
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/55497] Local array (char[]) initialized with a size taken from a static variable creates an ICE
2012-11-27 21:32 [Bug c++/55497] New: Local array (char[]) initialized with a size taken from a static variable creates an ICE greg.burri at gmail dot com
` (5 preceding siblings ...)
2012-11-28 10:50 ` paolo at gcc dot gnu.org
@ 2012-11-28 10:51 ` paolo.carlini at oracle dot com
6 siblings, 0 replies; 8+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-11-28 10:51 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55497
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to work| |4.7.3, 4.8.0
Resolution| |FIXED
Target Milestone|--- |4.7.3
Severity|major |normal
--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-28 10:51:02 UTC ---
Done.
^ permalink raw reply [flat|nested] 8+ messages in thread
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2012-11-27 21:32 [Bug c++/55497] New: Local array (char[]) initialized with a size taken from a static variable creates an ICE greg.burri at gmail dot com
2012-11-27 21:40 ` [Bug c++/55497] " paolo.carlini at oracle dot com
2012-11-27 22:28 ` greg.burri at gmail dot com
2012-11-27 22:28 ` greg.burri at gmail dot com
2012-11-27 22:31 ` greg.burri at gmail dot com
2012-11-27 23:42 ` paolo.carlini at oracle dot com
2012-11-28 10:50 ` paolo at gcc dot gnu.org
2012-11-28 10:51 ` paolo.carlini at oracle dot com
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