Bug#680521: g++-4.7: ICE while compiling code using <functional>

[Michał Mirosław <mirq-deboogs@rere.qmqm.pl>]

Package: g++-4.7
Version: 4.7.1-2
Severity: important

g++ ends with ICE on following test code:

===start===
#include <functional>

struct User
{
        void run(void *) {}
};

int main()
{
        User u;
        std::function<void()> p = std::bind(&User::run, &u, nullptr);
}
===end===

$ g++ -std=c++11 -c -O test.cpp
test.cpp: In constructor ‘std::function<_Res(_ArgTypes
....)>::function(_Functor, typename std::enable_if<(!
std::is_integral<_Functor>::value), std::function<_Res(_ArgTypes
....)>::_Useless>::type) [with _Functor = std::_Bind<std::_Mem_fn<void
(User::*)(void*)>(User*, std::nullptr_t)>; _Res = void; _ArgTypes = {};
typename std::enable_if<(! std::is_integral<_Functor>::value),
std::function<_Res(_ArgTypes ...)>::_Useless>::type =
std::function<void()>::_Useless]’:
test.cpp:12:1: internal compiler error: in type_contains_placeholder_1, at
tree.c:2957
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.7/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccTlnebC.out file, please attach this to
your bugreport.

Seems related to optimization and nullptr in args. When nullptr is replaced
with (void *)0, gcc compiles the code successfully.



-- System Information:
Debian Release: wheezy/sid
  APT prefers testing-proposed-updates
  APT policy: (500, 'testing-proposed-updates'), (500, 'testing'), (400, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.3.6+ (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=pl_PL.UTF-8, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages g++-4.7 depends on:
ii  gcc-4.7             4.7.1-2
ii  gcc-4.7-base        4.7.1-2
ii  libc6               2.13-33
ii  libgmp10            2:5.0.5+dfsg-2
ii  libmpc2             0.9-4
ii  libmpfr4            3.1.0-5
ii  libstdc++6-4.7-dev  4.7.1-2
ii  zlib1g              1:1.2.7.dfsg-13

g++-4.7 recommends no packages.

Versions of packages g++-4.7 suggests:
ii  g++-4.7-multilib    4.7.1-2
pn  gcc-4.7-doc         <none>
pn  libstdc++6-4.7-dbg  <none>

-- no debconf information