On Thu, Aug 21, 2025 at 02:52:46PM +0200, Christian Ehrhardt wrote: > Hi, > Debian and Ubuntu run the self tests of snek as integration tests like: > > `make SNEK_NATIVE=/usr/bin/snek SNEK_ARM=/usr/share/snek/snek-arm > SNEK_RISCV=/usr/share/snek/snek-riscv -C test check` > > Those tests recently generated signal by failing in the arm emulation > tests with `qemu-system-arm` - full log [1]. > > ``` > 224s Running test pass-precedence.py. > 224s pass python3 > 224s pass snek > 224s pass-precedence.py:72 Syntax error at "". > 224s ***************** snek-arm fail ********************* > 224s pass snek-riscv > ``` > > 14 tests failed, but all with quite similar signatures. > > But that only happens when executed on armhf, the other host > architectures are all happy [2]. > > I've separated the test and ran a git bisect on qemu 10.0 -> 10.1 as > somewhere here is the trigger. > That worked fine and identified this change [3].
CCing Richard Henderson since this was bisected to the following commit:
commit cf4905c03135f1181e86c618426f8d6c703b38c0
Author: Richard Henderson <richard.hender...@linaro.org>
Date: Sun Jan 12 20:29:41 2025 -0800
tcg: Convert deposit to TCGOutOpDeposit
>
> I must admit, I was able to debug it until here, but I can't see how
> these snek test failures could be caused by that change.
> And yes - arm emulation on an armhf platform isn't the most common scenario.
QEMU v10.1.0-rc4 has been tagged and the final QEMU v10.1.0 release is
scheduled for Tuesday, August 26th. I think a fix for this issue can go
through the -stable tree and be released as part of QEMU v10.1.1 since
the number of users affected appears to be small. Please let me know if
you disagree.
Thanks,
Stefan
>
> I can't predict if there is anything wrong in snek which now is
> treated differently by qemu to trigger this or if snek is all fine and
> qemu broken something - Therefore I've also reported it to snek [4].
>
> The tracking of the initial finding in Ubuntu is here if you want to
> see more about how this commit was identified [5].
>
> [1]:
> https://autopkgtest.ubuntu.com/results/autopkgtest-questing/questing/armhf/s/snek/20250818_045020_246a4@/log.gz
> [2]: https://autopkgtest.ubuntu.com/packages/s/snek
> [3]:
> https://salsa.debian.org/qemu-team/qemu/-/commit/cf4905c03135f1181e86c618426f8d6c703b38c0
> [4]: https://github.com/keith-packard/snek/issues/103
> [5]: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/2121124
>
> --
> Christian Ehrhardt
> Director of Engineering, Ubuntu Server
> Canonical Ltd
>
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