[buildd-tools-devel] Bug#778112: Bug#778112: schroot: ftbfs with GCC-5

[rleigh at codelibre.net]

> Matthias Klose <doko at debian.org> (2015-02-12):
>> The following tests FAILED:
>> Errors while running CTest
>> 	  2 - sbuild-chroot-chroot (Failed)
>> 	  6 - sbuild-run-parts (Failed)
>> make[2]: *** [test] Error 8
>> Makefile:117: recipe for target 'test' failed
>> make[2]: Leaving directory '/«PKGBUILDDIR»/debian/build'
>> make[1]: *** [install-arch] Error 2
>> debian/rules:83: recipe for target 'install-arch' failed
>> make[1]: Leaving directory '/«PKGBUILDDIR»'
>> make: *** [binary-arch] Error 2
>> debian/rules:39: recipe for target 'binary-arch' failed
>> dpkg-buildpackage: error: fakeroot debian/rules binary-arch gave error
>> exit status 2
>
> FWIW this isn't specific to gcc-5, the same happens with 4.9 in a sid
> development chroot.

I have tried reproducing this in an unstable VM, and I can certainly do
so.  It's throwing instantiating a static regex instance.

However, I can't reproduce as a minimal testcase.  Constructing the same
regex, either as an auto or static variable in a function scope or as a
global works perfectly.

std::regex was broken in earlier GCC releases, so we used boost::regex,
but I thought it was functional in these compiler versions.  The fact that
the minimal testcase works hints that it's a problem in schroot, but I'm
unable to see why the code is problematic.

IIRC it's throwing here:
https://github.com/codelibre-net/schroot/blob/76a85f0fb34d39f796185d296fadde81b79a3948/lib/schroot/util.cc#L157
or here:
https://github.com/codelibre-net/schroot/blob/76a85f0fb34d39f796185d296fadde81b79a3948/lib/schroot/util.cc#L157

We are wrapping the regex implementation here:
https://github.com/codelibre-net/schroot/blob/76a85f0fb34d39f796185d296fadde81b79a3948/lib/schroot/regex.h
(to support boost/tr1/std regex)
but the failure is in the constructor of the wrapped type, and I couldn't
reproduce with the wrapper or a std::regex.


Regards,
Roger