On Sunday, February 26 2023, I wrote:

> On Saturday, February 25 2023, I wrote:
>
>> On Monday, February 20 2023, David Bremner wrote:
>>
>>> David Bremner <da...@tethera.net> writes:
>>>
>>>> I don't think these are the same as previously encountered
>>>> native-compilation related failures. I get the same / similar failures
>>>> when running
>>>>
>>>> EMACS_INHIBIT_AUTOMATIC_NATIVE_COMPILATION=t emacs -q -batch -L . -l 
>>>> buttercup -f buttercup-run-discover
>>>>
>>>> as a non-root user with a defined home directory. Log is attached (there
>>>> is one more failure in the log, iiuc related to gpg missing in the
>>>> chroot).
>>>
>>> With the latest upstream master (32-182-g5561440) which contains the
>>> merge of PR 2002, this is down to 2 failures, both trampoline related.
>>
>> Very similar failures are also affecting emacs-web-server:
>>
>>   
>> https://ci.debian.net/data/autopkgtest/unstable/amd64/e/emacs-web-server/31076037/log.gz
>>
>> I suspected the problem could be related to emacs-buttercup, so I
>> updated it locally to the latest upstream version and rebuilt flycheck
>> with it, to no avail.
>
> I spent some more time investigating this problem and was able to
> pinpoint it to the fact that, for some reason, this problem happens when
> you have two (spy-on) calls and the first one uses :and-return-value,
> which is the case here.
>
> I'm not sure this is a bug with buttercup, but I filed an upstream bug
> with them just in case:
>
>   https://github.com/jorgenschaefer/emacs-buttercup/issues/230

The following incantation makes the testsuite pass for me:

  buttercup --eval "(setq native-comp-enable-subr-trampolines nil)" -L .

-- 
Sergio
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