/usr/arm-linux-gnueabi/include/c++/4.6.3/bits/functional_hash.h:184:5: internal compiler error: in write_builtin_type, at cp/mangle.c:2168

[Stefan Beller]

Attached there is a script(reportbug.sh) which tries to compile a minimal example file(testclass.cpp).
The file as found in /tmp/ccoYSkon.out is also attached.

The console output is:

In file included from /usr/arm-linux-gnueabi/include/c++/4.6.3/bits/basic_string.h:2974:0,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/string:54,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/bits/locale_classes.h:42,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/bits/ios_base.h:43,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/ios:43,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/ostream:40,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/iostream:40,
                 from testclass.cpp:4:
/usr/arm-linux-gnueabi/include/c++/4.6.3/bits/functional_hash.h: In instantiation of ‘std::size_t std::hash<_Tp>::operator()(_Tp) const [with _Tp = long double, std::size_t = unsigned int]’:
testclass.cpp:40:1: instantiated from here
/usr/arm-linux-gnueabi/include/c++/4.6.3/bits/functional_hash.h:184:5: internal compiler error: in write_builtin_type, at cp/mangle.c:2168
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccoYSkon.out file, please attach this to your bugreport.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gcc-arm-linux-gnueabi 4:4.6.2-7
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu9
Architecture: amd64
Date: Mon Jun 18 15:51:06 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: gcc-defaults-armel-cross
UpgradeStatus: Upgraded to precise on 2012-02-18 (120 days ago)

[Dave Gilbert (ubuntu-treblig)]

On Quantal, this happens on arm-linux-gnueabi-g++-4.6 but not 4.7

dg@major:~/Downloads$ arm-linux-gnueabi-g++-4.7 -g --static -W -Wall -Wextra -std=c++0x -pedantic -pedantic-errors -ofast -ftree-vectorize -fno-exceptions -fno-rtti -ffast-math -flto -funsafe-loop-optimizations -Wunsafe-loop-optimizations -fmodulo-sched -fsched-spec-load -ftracer testclass.cpp -o bugreport
dg@major:~/Downloads$ arm-linux-gnueabi-g++-4.6 -g --static -W -Wall -Wextra -std=c++0x -pedantic -pedantic-errors -ofast -ftree-vectorize -fno-exceptions -fno-rtti -ffast-math -flto -funsafe-loop-optimizations -Wunsafe-loop-optimizations -fmodulo-sched -fsched-spec-load -ftracer testclass.cpp -o bugreport
In file included from /usr/arm-linux-gnueabi/include/c++/4.6.3/bits/basic_string.h:2974:0,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/string:54,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/bits/locale_classes.h:42,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/bits/ios_base.h:43,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/ios:43,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/ostream:40,
                 from /usr/arm-linux-gnueabi/include/c++/4.6.3/iostream:40,
                 from testclass.cpp:4:
/usr/arm-linux-gnueabi/include/c++/4.6.3/bits/functional_hash.h: In instantiation of ‘std::size_t std::hash<_Tp>::operator()(_Tp) const [with _Tp = long double, std::size_t = unsigned int]’:
testclass.cpp:40:1: instantiated from here
/usr/arm-linux-gnueabi/include/c++/4.6.3/bits/functional_hash.h:184:5: internal compiler error: in write_builtin_type, at cp/mangle.c:2168
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.
Preprocessed source stored into /tmp/cctWjhp9.out file, please attach this to your bugreport.

[Dave Gilbert (ubuntu-treblig)]

since it's 4.6 on both Precise (as per original report) and on Quantal seems more appropriate here.

[Marcin Juszkiewicz (hrw)]

Also affects g++ on armhf/precise:

root@ubuntu:~# g++ -g --static -W -Wall -Wextra -std=c++0x -pedantic -pedantic-errors -ofast -ftree-vectorize -fno-exceptions -fno-rtti -ffast-math -flto -funsafe-loop-optimizations -Wunsafe-loop-optimizations -fmodulo-sched -fsched-spec-load -ftracer testclass.cpp -o bugreport
In file included from /usr/include/c++/4.6/bits/basic_string.h:2974:0,
                 from /usr/include/c++/4.6/string:54,
                 from /usr/include/c++/4.6/bits/locale_classes.h:42,
                 from /usr/include/c++/4.6/bits/ios_base.h:43,
                 from /usr/include/c++/4.6/ios:43,
                 from /usr/include/c++/4.6/ostream:40,
                 from /usr/include/c++/4.6/iostream:40,
                 from testclass.cpp:4:
/usr/include/c++/4.6/bits/functional_hash.h: In instantiation of 'std::size_t std::hash<_Tp>::operator()(_Tp) const [with _Tp = long double, std::size_t = unsigned int]':
testclass.cpp:40:1: instantiated from here
/usr/include/c++/4.6/bits/functional_hash.h:184:5: internal compiler error: in write_builtin_type, at cp/mangle.c:2168
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccXcfMvM.out file, please attach this to your bugreport.

[Marcin Juszkiewicz (hrw)]

Also happens with 4.6/quantal/armhf

[Matthias Klose (doko)]

fixed in 4.7, opening a gcc-linaro task, but I assume this will end up as won't fix.

[Zhenqiang Chen (zhenqiang-chen)]

Thank you for the bug report. I've confirmed this with gcc-linaro-4.6-2012.08 on ARM:

./arm-linux-gnueabi-g++ -g --static -W -Wall -Wextra -std=c++0x -pedantic -pedantic-errors -ofast -ftree-vectorize -fno-exceptions -fno-rtti -ffast-math -flto -funsafe-loop-optimizations -Wunsafe-loop-optimizations -fmodulo-sched -fsched-spec-load -ftracer testclass.cpp
In file included from /home/zheche01/gcc-linaro-arm-linux-gnueabi-2012.08/bin/../lib/gcc/arm-linux-gnueabi/4.6.4/../../../../arm-linux-gnueabi/include/c++/4.6.4/bits/basic_string.h:2974:0,
                 from /home/zheche01/gcc-linaro-arm-linux-gnueabi-2012.08/bin/../lib/gcc/arm-linux-gnueabi/4.6.4/../../../../arm-linux-gnueabi/include/c++/4.6.4/string:54,
                 from /home/zheche01/gcc-linaro-arm-linux-gnueabi-2012.08/bin/../lib/gcc/arm-linux-gnueabi/4.6.4/../../../../arm-linux-gnueabi/include/c++/4.6.4/bits/locale_classes.h:42,
                 from /home/zheche01/gcc-linaro-arm-linux-gnueabi-2012.08/bin/../lib/gcc/arm-linux-gnueabi/4.6.4/../../../../arm-linux-gnueabi/include/c++/4.6.4/bits/ios_base.h:43,
                 from /home/zheche01/gcc-linaro-arm-linux-gnueabi-2012.08/bin/../lib/gcc/arm-linux-gnueabi/4.6.4/../../../../arm-linux-gnueabi/include/c++/4.6.4/ios:43,
                 from /home/zheche01/gcc-linaro-arm-linux-gnueabi-2012.08/bin/../lib/gcc/arm-linux-gnueabi/4.6.4/../../../../arm-linux-gnueabi/include/c++/4.6.4/ostream:40,
                 from /home/zheche01/gcc-linaro-arm-linux-gnueabi-2012.08/bin/../lib/gcc/arm-linux-gnueabi/4.6.4/../../../../arm-linux-gnueabi/include/c++/4.6.4/iostream:40,
                 from t3.cpp:4:
/home/zheche01/gcc-linaro-arm-linux-gnueabi-2012.08/bin/../lib/gcc/arm-linux-gnueabi/4.6.4/../../../../arm-linux-gnueabi/include/c++/4.6.4/bits/functional_hash.h: In instantiation of ‘std::size_t std::hash<_Tp>::operator()(_Tp) const [with _Tp = long double, std::size_t = unsigned int]’:
t3.cpp:40:1: instantiated from here
/home/zheche01/gcc-linaro-arm-linux-gnueabi-2012.08/bin/../lib/gcc/arm-linux-gnueabi/4.6.4/../../../../arm-linux-gnueabi/include/c++/4.6.4/bits/functional_hash.h:184:5: internal compiler error: in write_builtin_type, at cp/mangle.c:2168
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.launchpad.net/gcc-linaro> for instructions.

I can not reproduce this with gcc-linaro-4.7-2012.08 on ARM

[Zhenqiang Chen (zhenqiang-chen)]

Reproduce this with FSF gcc-4.6.3.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51432 records the issue.

c++0x is experimental in 4.6 and mildly less experimental in 4.7.

For this case, you can workaround it with no -std=c++0x or -flto.

I've set it to low priority as it uses experimental feature, has work around, exists upstream, and 4.7 clears the problem.

[Viktor (vchong)]

4.6 no longer supported and fixed in 4.7.