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Found the issue: in the default gui setup, ediff control panel lives in a tiny frame of height of 1 line where (which-key--popup-max-dimensions) returns (0 . 12) and which-key then tries to partition the results into groups of zero.
Possible fixes:
We could show the completion in the other frame. This is where the minibuffer lives and this will be consistent with how M-x, M-: etc behave in the ediff control panel.
We could just not show anything at all when number of rows is 0.
shitikanth
pushed a commit
to shitikanth/emacs-which-key
that referenced
this issue
Jul 26, 2021
Steps to reproduce:
emacs -Q -L $which-key-srcdir -l bug.el
(just loads which-key and starts ediff on two empty buffers).# C-g
. (Sometimes it takes a couple of tries before it crashes,)Lisp backtrace from gdb:
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