bug#22337: Breakage on amd64 when built with -O1 and higher

[Andy Wingo]

On Sat 09 Jan 2016 15:57, address@hidden (Ludovic Courtès) writes:

> Andreas Metzler <address@hidden> skribis:
>
>> Debian used to build guile-2.0 without optimization, after changing to
>> -O2 random segfaults in guile-gnutls testsuite started to appear on
>> amd64.
>
> Are you sure the GnuTLS issue has anything to do with that?
>
> Guile has always been built with ‘-O2 -g’ by default, and building with
> ‘-O0’ has never really been supported (the VM engine could eat too much
> stack space and do silly things.)

Apparently this is still an issue.  Debian actually reverted to
compiling Guile with -O0:

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=809608

Which is terrible of course.  Surely it is a bug in the Guile GnuTLS
bindings and not in Guile proper.  Compiling Guile with -O2 probably
holds on to less garbage; could it be that GnuTLS is erroneously not
making its data structures visible?

Andy