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From: Philipp Stephani
Newsgroups: gmane.emacs.bugs
Subject: bug#40109: 27.0.90;
simple-delete-trailing-whitespace--bug-21766 fails if Git isn't
installed
Date: Thu, 28 Jan 2021 10:05:00 +0100
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To: Lars Ingebrigtsen
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Am Do., 28. Jan. 2021 um 09:46 Uhr schrieb Lars Ingebrigtsen :
>
>
> > Ah, the problem is that with-demoted-errors uses
> > condition-case-unless-debug. More minimal example:
> >
> > $ emacs -Q -batch -eval '(let ((debug-on-error t)) (ignore-errors
> > (with-demoted-errors "%S" (error "foo"))))'
> > Debugger entered--Lisp error: (error "foo")
> > [=E2=80=A6]
> >
> > I think this behavior is very confusing. Both version.el and
> > trampver.el try to do the right thing, but that breaks in such a
> > situation.
>
> It is somewhat confusing, yes, but it's also pretty convenient in some
> circumstances.
But not when running unit tests.
>
> In any case, are you still seeing the reported test problem?
I also can't reproduce this any more, but the root cause (ERT binding
`debug-on-error' to t) is still there, so I think we're just lucky
that this doesn't happen any more for this specific test.
I guess this bug can be closed, but we should really make some
progress on https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D11218.