Bug#843379: blender: FTBFS (internal compiler error)

[Santiago Vila]

Package: src:blender
Version: 2.77.a+dfsg0-9
Severity: serious

Dear maintainer:

I tried to build this package in stretch with "dpkg-buildpackage -A"
(which is what the "Arch: all" autobuilder would do to build it)
but it failed:

--------------------------------------------------------------------------------
[...]
 debian/rules build-indep
dh build-indep --buildsystem=cmake --parallel --with python3
   dh_testdir -i -O--buildsystem=cmake -O--parallel
   dh_update_autotools_config -i -O--buildsystem=cmake -O--parallel
   debian/rules override_dh_auto_configure
make[1]: Entering directory '/<<BUILDDIR>>/blender-2.77.a+dfsg0'
dh_auto_configure -- \
	-DCMAKE_INSTALL_PREFIX=/usr \
	-DCMAKE_SKIP_RPATH=ON \
	-DCMAKE_VERBOSE_MAKEFILE=ON \
	-DFREETYPE_INCLUDE_DIRS="/usr/include/freetype2" \
	-DPYTHON_VERSION=3.5 \
	-DWITH_CODEC_FFMPEG=ON \

[... snipped ...]

 ((
# 110 "/<<BUILDDIR>>/blender-2.77.a+dfsg0/intern/cycles/kernel/kernels/cpu/kernel_cpu_impl.h"
 output_luma == 
# 110 "/<<BUILDDIR>>/blender-2.77.a+dfsg0/intern/cycles/kernel/kernels/cpu/kernel_cpu_impl.h" 3 4
 __null) ? static_cast<void> (0) : __assert_fail (
# 110 "/<<BUILDDIR>>/blender-2.77.a+dfsg0/intern/cycles/kernel/kernels/cpu/kernel_cpu_impl.h"
 "output_luma == __null"
# 110 "/<<BUILDDIR>>/blender-2.77.a+dfsg0/intern/cycles/kernel/kernels/cpu/kernel_cpu_impl.h" 3 4
 , "/<<BUILDDIR>>/blender-2.77.a+dfsg0/intern/cycles/kernel/kernels/cpu/kernel_cpu_impl.h", 110, __PRETTY_FUNCTION__))
# 110 "/<<BUILDDIR>>/blender-2.77.a+dfsg0/intern/cycles/kernel/kernels/cpu/kernel_cpu_impl.h"
                                   ;
  kernel_bake_evaluate(kg,
                       input,
                       output,
                       (ShaderEvalType)type,
                       filter,
                       i,
                       offset,
                       sample);
 }
 else {
  kernel_shader_evaluate(kg,
                         input,
                         output,
                         output_luma,
                         (ShaderEvalType)type,
                         i,
                         sample);
 }
}

}
# 37 "/<<BUILDDIR>>/blender-2.77.a+dfsg0/intern/cycles/kernel/kernels/cpu/kernel_avx2.cpp" 2
=== END GCC DUMP ===
intern/cycles/kernel/CMakeFiles/cycles_kernel.dir/build.make:185: recipe for target 'intern/cycles/kernel/CMakeFiles/cycles_kernel.dir/kernels/cpu/kernel_avx2.cpp.o' failed
make[3]: *** [intern/cycles/kernel/CMakeFiles/cycles_kernel.dir/kernels/cpu/kernel_avx2.cpp.o] Error 1
make[3]: Leaving directory '/<<BUILDDIR>>/blender-2.77.a+dfsg0/obj-x86_64-linux-gnu'
CMakeFiles/Makefile2:1315: recipe for target 'intern/cycles/kernel/CMakeFiles/cycles_kernel.dir/all' failed
make[2]: *** [intern/cycles/kernel/CMakeFiles/cycles_kernel.dir/all] Error 2
make[2]: Leaving directory '/<<BUILDDIR>>/blender-2.77.a+dfsg0/obj-x86_64-linux-gnu'
Makefile:163: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/<<BUILDDIR>>/blender-2.77.a+dfsg0/obj-x86_64-linux-gnu'
dh_auto_build: make -j1 returned exit code 2
debian/rules:72: recipe for target 'build-indep' failed
make: *** [build-indep] Error 2
dpkg-buildpackage: error: debian/rules build-indep gave error exit status 2
--------------------------------------------------------------------------------

This may be reproduced easily. There are full logs available here:

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/blender.html

If you reassign to gcc-6, please use "affects" as well so that we can still see this
bug in the web page for blender.

Thanks.