bug#56772: 29.0.50; regexp-builder window is very tall when temp-buffer-resize-mode is enabled

[Daniel Martín]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Daniel Martín <mardani29@yahoo.es> writes:
>
>> Steps to reproduce:
>>
>> emacs -Q
>> M-x temp-buffer-resize-mode RET
>> M-x regexp-builder RET
>>
>> Actual result:
>>
>> The regexp-builder window occupies half of the frame's height (much more
>> than its empty contents would require).
>
> I'm unable to reproduce this problem on the current trunk.  Are there
> any additional steps needed?

The reproduction steps were not precise enough, I think.  I can
reproduce it consistently with:

emacs -Q
M-x temp-buffer-resize-mode RET
M-x regexp-builder RET
C-c C-q
C-h m
C-x o
q
M-x regexp-builder RET

This second time the window will occupy more space than necessary.

If I omit setting temp-buffer-resize-mode in the first step, I cannot
reproduce the behavior.