Bug#858261: gcc-6: "internal compiler error: Segmentation fault" when building webkit2gtk

[Lorenz Hübschle-Schneider <lorenz-dev@lgh-alumni.de>]

Package: g++-6
Version: 6.3.0-9
Followup-For: Bug #858261

Dear Maintainer,

I get a similar failure when compiling RaftLib [1]. I'm not entirely sure it's
the same bug but it appeared with the last update (6.3.0-9) so it might well be.

Steps to reproduce:
git clone https://github.com/RaftLib/RaftLib
cd RaftLib
mkdir build
cd build
cmake ..
make

This fails with:

In file included from /tmp/RaftLib/raftinc/ringbufferheap.tcc:25:0,
                 from /tmp/RaftLib/raftinc/ringbufferbase.tcc:66,
                 from /tmp/RaftLib/raftinc/ringbuffer.tcc:34,
                 from /tmp/RaftLib/raftinc/port.hpp:37,
                 from /tmp/RaftLib/raftinc/kernel.hpp:29,
                 from /tmp/RaftLib/raftinc/allocate.hpp:29,
                 from /tmp/RaftLib/src/allocate.cpp:25:
/tmp/RaftLib/raftinc/ringbufferheap_abstract.tcc: In lambda function:
/tmp/RaftLib/raftinc/ringbufferheap_abstract.tcc:371:64: internal compiler error: Segmentation fault
                         local_insert_helper( *begin, *end, sig );
                                                                ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
src/CMakeFiles/raft.dir/build.make:86: recipe for target 'src/CMakeFiles/raft.dir/allocate.cpp.o' failed

Didn't get a coredump despite them being enabled, but don't have time to figure
out what's going on with that right now, sorry.

Cheers,
Lorenz

[1] https://github.com/RaftLib/RaftLib

-- System Information:
Debian Release: 9.0
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages g++-6 depends on:
ii  gcc-6            6.3.0-9
ii  gcc-6-base       6.3.0-9
ii  libc6            2.24-9
ii  libgmp10         2:6.1.2+dfsg-1
ii  libisl15         0.18-1
ii  libmpc3          1.0.3-1+b2
ii  libmpfr4         3.1.5-1
ii  libstdc++-6-dev  6.3.0-9
ii  zlib1g           1:1.2.8.dfsg-5

g++-6 recommends no packages.

Versions of packages g++-6 suggests:
ii  g++-6-multilib    6.3.0-9
pn  gcc-6-doc         <none>
ii  libstdc++6-6-dbg  6.3.0-9

-- no debconf information