[O] 26.1, 9.1.9; startup:overview, smerge-ediff frame unusable, unremovable

[Van L]

Hello,

I found myself in a situation to 
smerge-ediff with three windows 
split inside a frame. 

There was another tiny frame with 
a question mark which I didn’t do 
anything to. Maybe I had to.

I had tried to git merge and there 
were conflicts needing attention. 

Looking at the file in smerge-mode 
and then calling smerge-ediff 
produced my Org-Mode buffer 
collapsed to 

#+STARTUP: overview

in all three windows. There was 
nothing I could do to expand the 
headlines. Then abandoning that, 
I found the frame itself wasn’t 
willing to be dismissed by C-x 5 0.

I had to quit the entire emacs.

Thanks in advance.

-

(org-version)
"9.1.9"

(emacs-version)
"GNU Emacs 26.1 (build 1, x86_64--netbsd, GTK+ Version 2.24.32)
 of 2018-09-17"