Bug#787689: [armhf] Internal compiler error while building qtbase (qt5)

[Lisandro Damián Nicanor Pérez Meyer]

Package: g++-4.9
Version: 4.9.2-19
Severity: serious
Justification: fails to build from source (but built successfully in the past)

Note: I used the virtual severity "does-not-builds" but reportbug ended with
this severity.

Hi!

While building qtbase 4.5.2 [build] we hit [ice]. The build log even contains
a gcc dump.

Getting this version to build means a lot for us Qt/KDE maintainers because:

- We need to get it in unstable before gcc5 becomes the default comoiler or
  stuff getting compiled with gcc5 and qt5 currently in sid will create ABI
  breakage

- We need this in to get the kf5 (KDE with Qt5) stuff in unstable.

I will see if I can get a minimal test case out of this but I don't think I'll
be able :-/

[build] <https://buildd.debian.org/status/fetch.php?pkg=qtbase-opensource-src&arch=armhf&ver=5.4.2%2Bdfsg-2&stamp=1433380420>
[ice] ../../xml/sax/qxml.cpp:6467:1: internal compiler error: in add_stores, at var-tracking.c:6000

Kinds regards, Lisandro.

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'testing'), (101, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.0.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=es_AR.UTF-8, LC_CTYPE=es_AR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Init: systemd (via /run/systemd/system)

Versions of packages g++-4.9 depends on:
ii  gcc-4.9            4.9.2-19
ii  gcc-4.9-base       4.9.2-19
ii  libc6              2.19-18
ii  libcloog-isl4      0.18.3-1
ii  libgmp10           2:6.0.0+dfsg-6
ii  libisl13           0.14-2
ii  libmpc3            1.0.3-1
ii  libmpfr4           3.1.2-3
ii  libstdc++-4.9-dev  4.9.2-19
ii  zlib1g             1:1.2.8.dfsg-2+b1

g++-4.9 recommends no packages.

Versions of packages g++-4.9 suggests:
pn  g++-4.9-multilib    <none>
pn  gcc-4.9-doc         <none>
pn  libstdc++6-4.9-dbg  <none>

-- no debconf information