[armhf] exception not caught when defining identical lambdas built with -O2

The failure was originally observed on a mir unit test failure here:
https://launchpadlibrarian.net/213612810/buildlog_ubuntu-wily-armhf.mir_0.15.0%2B15.10.20150804-0ubuntu1_BUILDING.txt.gz

which used the current wily-proposed 5.2.1-12ubuntu2 gcc5 package.

This appears to work for me with the latest released g++.

[17:50:00] mtrudel:~ $ g++-5 -std=c++11 -O2 -o toto toto.cc
[17:50:12] mtrudel:~ $ ./toto
ignored exception: some error
ignored exception: some error
[17:50:30] mtrudel:~ $ dpkg -S g++-5
g++-5: /usr/share/man/man1/x86_64-linux-gnu-g++-5.1.gz
g++-5: /usr/bin/g++-5
g++-5: /usr/share/doc/g++-5
g++-5: /usr/bin/x86_64-linux-gnu-g++-5
g++-5: /usr/share/man/man1/g++-5.1.gz
[17:52:39] mtrudel:~ $ g++-5 -v
Using built-in specs.
COLLECT_GCC=g++-5
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.2.1-15ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --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 5.2.1 20150808 (Ubuntu 5.2.1-15ubuntu1)
[17:52:50] mtrudel:~ $ dpkg -l g++-5 | grep '^ii'
ii g++-5 5.2.1-15ubuntu1 amd64 GNU C++ compiler

Right it only fails for armhf arch.

Ah, oops. I hadn't tried it on armhf. It does break for me; confirming:

(wily-armhf)root@gaea:~# ./toto
terminate called after throwing an instance of 'std::runtime_error'
  what(): some error
qemu: uncaught target signal 6 (Aborted) - core dumped
Aborted (core dumped)

confirmed, work around is to build with -O1

This bug was fixed in the package gcc-5 - 5.2.1-16ubuntu1

---------------
gcc-5 (5.2.1-16ubuntu1) wily; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.

gcc-5 (5.2.1-16) unstable; urgency=medium

  * Update to SVN 20150903 (r227431, 5.2.1) from the gcc-5-branch.
    - Backport the filesystem TS library.
  * libstdc++-dev: Install libstdc++fs.a.
  * Again, configure with --enable-targets=powerpcle-linux on ppc64el.
  * Apply proposed patch for PR target/67211 (ppc64el).
  * libgo-dev: Install libgolibbegin.a.
  * Apply proposed patch for PR target/67280 (ARM). LP: #1482320.

 -- Matthias Klose <email address hidden> Thu, 03 Sep 2015 16:00:26 +0200