[Octave-bug-tracker] [bug #62207] segfault in bug-35881/bug-35881.tst in 32-bit ARM and MIPS

[Sébastien Villemot]

Follow-up Comment #3, bug #62207 (project octave):

It seems that the problem is not actually tied to bug-35881/bug-35881.tst.

I’ve launch rebuilds of octave 7.0.92 on armel, armhf and mipsel. It
suceeded the second time on armel. It failed on armhf, but at a different
place:
https://buildd.debian.org/status/fetch.php?pkg=octave&arch=armhf&ver=7.0.92-1&stamp=1647985090&raw=0
The build is not yet finished on mipsel.

I’ve also tried to replicate the problem on other armhf and mipsel machines,
and there the build suceeded.

So it looks like it’s a random issue, maybe a race condition or an invalid
memory write that does not always cause a crash. It may actually be the same
issue as bug #61911, contrary to what I initially thought.

I’m going to try to extract more information, probably by rebuilding with
ASAN.

I also wonder whether this is a 32-bit specific issue, since so far it has
only manifested on 32-bit architectures. However it has not yet shown up on
32-bit x86, I’m also going to see if I can reproduce it there.

Also note that this issue is a real blocker for Debian. We cannot ship a
package that randomly segfaults on several release architectures, in
particular at build time.



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