Bug#726733: av_register_all() segfaults on s390x in some cases (regression, causes FTBFS)

[Moritz Muehlenhoff]

On Fri, Oct 18, 2013 at 01:51:41PM +0000, Thibaut Paumard wrote:
> Package: libavformat-dev
> Version: 6:9.10-1
> Severity: serious
> File: /usr/include/libavformat/avformat.h
> 
> Hi,
> 
> My package yorick-av fails to build on s390x:
> https://buildd.debian.org/status/package.php?p=yorick-av
> 
> It used to build fine previously.
> 
> After investigation, I can build a minimal example which still fails and only contains a call to av_register_all() and segfaults precisely on this line.
> 
> This is in the context of a plug-in which is dlopen'ed from an interpreter (yorick). The plug-in works fine on all other architectures. I also tried calling av_register_all() directly from main() in a C program, it doesn't fail there. There may be something odd happening with the dlopening or the link flags that this requires (-fPIC -shared).

Adding s390 at l.d.o to CC.

Thibaut, can you post your minimal test case?

Cheers,
        Moritz