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* [Bug c++/50015] New: std::initializer_list<std::string> members are not properly initialized
@ 2011-08-07 15:48 danny.dyk@tu-dortmund.de
2011-08-07 15:50 ` [Bug c++/50015] " danny.dyk@tu-dortmund.de
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: danny.dyk@tu-dortmund.de @ 2011-08-07 15:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50015
Summary: std::initializer_list<std::string> members are not
properly initialized
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: danny.dyk@tu-dortmund.de
Created attachment 24940
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24940
Output of 'g++ -std=c++0x -save-temps -o test-case test-case.cc'
When creating a std::initializer_list<std::string> as part of a struct, the
actual
object is not properly initialized. Consider the following test case:
-- BEGIN --
#include <initializer_list>
#include <iostream>
#include <string>
struct T
{
std::initializer_list<std::string> s;
};
T foo
{
{"foo", "bar", "baz"}
};
int main(int, char**)
{
for (auto t = foo.s.begin(), t_end = foo.s.end() ; t != t_end ; ++t)
std::cout << *t << std::endl;
return 0;
}
-- END --
After compiling this test case using
g++ -Wall -pedantic -std=c++0x -o test-case test-case.cc
[no errors, no warnings]
the execution of the resulting binary via
./test-case
either raises a segmentation fault or produces garbled output, e.g.,
foo1`particularÿÿÿÿbar1ÿÿ
Looks very much like terminating '\0's are not in place.
This bug was first seen when using gcc-4.4.5 and is reproducable under
gcc-4.5.0
up to gcc-4.6.1. The particular version of gcc-4.6.1 was configured as
configure \
--prefix=/het/packages/gcc-${VERSION} \
--program-prefix=het- \
--program-suffix=-${VERSION} \
--enable-languages=c,c++ \
--disable-multilib
and built on an amd64 system.
I will attach the output of
g++ -std=c++0x -save-temps -o test-case test-case.cc
g++ -std=c++0x -fdump-tree-gimple -o test-case test-case.cc
to this bug report.
Thank you to Alexander Faeroey for help in reducing the segfaulting code to
a manageable test case.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/50015] std::initializer_list<std::string> members are not properly initialized
2011-08-07 15:48 [Bug c++/50015] New: std::initializer_list<std::string> members are not properly initialized danny.dyk@tu-dortmund.de
@ 2011-08-07 15:50 ` danny.dyk@tu-dortmund.de
2011-08-07 16:38 ` [Bug c++/50015] [C++0x] " paolo.carlini at oracle dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: danny.dyk@tu-dortmund.de @ 2011-08-07 15:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50015
--- Comment #1 from Danny van Dyk <danny.dyk@tu-dortmund.de> 2011-08-07 15:49:43 UTC ---
Created attachment 24941
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24941
Output of 'g++ -std=c++0x -fdump-tree-gimple -o test-case test-case.cc'
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/50015] [C++0x] std::initializer_list<std::string> members are not properly initialized
2011-08-07 15:48 [Bug c++/50015] New: std::initializer_list<std::string> members are not properly initialized danny.dyk@tu-dortmund.de
2011-08-07 15:50 ` [Bug c++/50015] " danny.dyk@tu-dortmund.de
@ 2011-08-07 16:38 ` paolo.carlini at oracle dot com
2011-08-08 13:55 ` jason at gcc dot gnu.org
2011-11-04 16:26 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: paolo.carlini at oracle dot com @ 2011-08-07 16:38 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50015
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
Summary|std::initializer_list<std:: |[C++0x]
|string> members are not |std::initializer_list<std::
|properly initialized |string> members are not
| |properly initialized
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-08-07 16:38:30 UTC ---
Also basing on the errors produced by valgrind, seems related to PR48370. Jason
can you have a look / maybe close as duplicate?
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/50015] [C++0x] std::initializer_list<std::string> members are not properly initialized
2011-08-07 15:48 [Bug c++/50015] New: std::initializer_list<std::string> members are not properly initialized danny.dyk@tu-dortmund.de
2011-08-07 15:50 ` [Bug c++/50015] " danny.dyk@tu-dortmund.de
2011-08-07 16:38 ` [Bug c++/50015] [C++0x] " paolo.carlini at oracle dot com
@ 2011-08-08 13:55 ` jason at gcc dot gnu.org
2011-11-04 16:26 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu.org @ 2011-08-08 13:55 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50015
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2011-08-08 13:54:30 UTC ---
Yep, same bug.
*** This bug has been marked as a duplicate of bug 48370 ***
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/50015] [C++0x] std::initializer_list<std::string> members are not properly initialized
2011-08-07 15:48 [Bug c++/50015] New: std::initializer_list<std::string> members are not properly initialized danny.dyk@tu-dortmund.de
` (2 preceding siblings ...)
2011-08-08 13:55 ` jason at gcc dot gnu.org
@ 2011-11-04 16:26 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu.org @ 2011-11-04 16:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50015
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2011-11-04 16:26:11 UTC ---
I verified that my patch for 48370 also fixes this testcase.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2011-08-07 15:48 [Bug c++/50015] New: std::initializer_list<std::string> members are not properly initialized danny.dyk@tu-dortmund.de
2011-08-07 15:50 ` [Bug c++/50015] " danny.dyk@tu-dortmund.de
2011-08-07 16:38 ` [Bug c++/50015] [C++0x] " paolo.carlini at oracle dot com
2011-08-08 13:55 ` jason at gcc dot gnu.org
2011-11-04 16:26 ` jason at gcc dot gnu.org
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