bug#45898: 27.1; wedged in redisplay again

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> Then there's a problem of determining which window is the problematic
> one.

Idea: Perhaps our "redisplay is wedged" function should basically be
"switch to a *warning* buffer".  I.e., if we can determine that Window
Foo is the problem, then switch the buffer in that window to a buffer
that reads "Redisplay was hanging in buffer *foo*".  If we can't
determine the window that's handing, then just switch all windows (in
all frames) to that warning buffer.

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