bug#47067: 28.0.50; [feature/native-comp] Crash while scrolling through dispnew.c

[Eli Zaretskii]

> From: Andrea Corallo <akrl@sdf.org>
> Cc: Pip Cet <pipcet@gmail.com>, 47067@debbugs.gnu.org
> Date: Sat, 13 Mar 2021 20:53:00 +0000
> 
> > I'd like this investigation to be less of a blind search, sorry.  can
> > you tell what to check or look at to see if this is relevant?
> 
> One confirmation that the issue is the one suggested by Pip would be
> running the test we added for this with like:
> 
> $ ./src/emacs -batch -l test/src/comp-tests.el --eval 
> '(ert-run-tests-batch-and-exit "46824-1")'
> 
> If the test-case fails it would be a clear marker, if it doesn't the
> issue might still the be the suggested one but the different architecture
> might play a role here making the test-case ineffective.

This test succeeds.

> PS Eli, even better would be to run all tests in comp-tests.el as a
> quick sanity check to verify that all is okay.

This is on my list of things to do, but with such basic instability I
thought it was premature.