http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50247
Bug #: 50247
Summary: #pragma pack std::set segfault
Classification: Unclassified
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: jsl...@gmail.com
Created attachment 25148
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25148
preprocessed file (with 4.6.1)
When using #pragma pack(1) following code triggers a segfault in stl_tree.h.
When not using #pragma pack, there is no segfault.
Simple testcase:
#pragma pack(1)
#include <set>
class A
{
public:
bool operator< ( const A& y) const
{
return this->i < y.i;
}
int i;
A(int j)
{
this->i = j;
}
};
int main(void)
{
std::set<A> aSet;
A a(1);
aSet.insert(a);
return 0;
}
compiled with: g++ test.cpp
Code
g++ -v:
Using built-in specs.
COLLECT_GCC=g++-4.6
COLLECT_LTO_WRAPPER=/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.6.1/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.6.0-3~ppa1'
--with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++,go --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-multiarch
--with-multiarch-defaults=x86_64-linux-gnu --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib/x86_64-linux-gnu
--without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib/x86_64-linux-gnu
--enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-plugin --enable-objc-gc --disable-werror
--with-arch-32=i686 --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.1 20110409 (prerelease) (Ubuntu 4.6.0-3~ppa1)
This also occured with g++ 4.5.2 (x86_64) and with g++ 4.5.3 (arm)
g++ 4.5.2 (x86_64):
g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.5.2/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.5.2-8ubuntu4' --with-bugurl=file:///usr/share/doc/gcc-4.5/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.5 --enable-shared --enable-multiarch
--with-multiarch-defaults=x86_64-linux-gnu --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib/x86_64-linux-gnu
--without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.5 --libdir=/usr/lib/x86_64-linux-gnu
--enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-plugin --enable-gold --enable-ld=default
--with-plugin-ld=ld.gold --enable-objc-gc --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
g++ 4.5.3 (arm):
Using built-in specs.
COLLECT_GCC=/home/jsn/rtx4088git/toolchain_and_rootfs/output/host/usr/bin/arm-unknown-linux-uclibcgnueabi-g++
COLLECT_LTO_WRAPPER=/home/jsn/rtx4088git/toolchain_and_rootfs/output/host/usr/libexec/gcc/arm-unknown-linux-uclibcgnueabi/4.5.3/lto-wrapper
Target: arm-unknown-linux-uclibcgnueabi
Configured with:
/home/jsn/rtx4088git/toolchain_and_rootfs/output/toolchain/gcc-4.5.3/configure
--prefix=/home/jsn/rtx4088git/toolchain_and_rootfs/output/host/usr
--build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu
--target=arm-unknown-linux-uclibcgnueabi --enable-languages=c,c++
--with-sysroot=/home/jsn/rtx4088git/toolchain_and_rootfs/output/host/usr/arm-unknown-linux-uclibcgnueabi/sysroot
--with-build-time-tools=/home/jsn/rtx4088git/toolchain_and_rootfs/output/host/usr/arm-unknown-linux-uclibcgnueabi/bin
--disable-__cxa_atexit --enable-target-optspace --disable-libgomp --with-gnu-ld
--disable-libssp --disable-multilib --disable-tls --enable-shared
--with-gmp=/home/jsn/rtx4088git/toolchain_and_rootfs/output/host/usr
--with-mpfr=/home/jsn/rtx4088git/toolchain_and_rootfs/output/host/usr
--with-mpc=/home/jsn/rtx4088git/toolchain_and_rootfs/output/host/usr
--disable-nls --enable-threads --disable-decimal-float --with-float=soft
--with-abi=aapcs-linux --with-arch=armv5te --with-tune=arm926ej-s
--with-pkgversion='Buildroot 2011.08-rc1-ged13158-dirty'
--with-bugurl=http://bugs.buildroot.net/
Thread model: posix
gcc version 4.5.3 (Buildroot 2011.08-rc1-ged13158-dirty)
