http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50015
Summary: std::initializer_list members are not
properly initialized
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: danny@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 as part of a struct, the
actual
object is not properly initialized. Consider the following test case:
-- BEGIN --
#include
#include
#include
struct T
{
std::initializer_list 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.
