[BUG][CRASH] Non-interactive Kakoune session crashes with 'double free or corruption' on a particular dataset/command sequence

[schragge]

Version of Kakoune

v2023.08.05-248-g4101e181

Reproducer

When solving VimGolf challenge Changing around text with citations, using -ui dummy or -ui json

kak in -ui dummy -e 'exec Qm*nWd<a-l>d<a-d>n<a-c>\fo<c-n>{<c-r>"}<esc>Q8q:wq<ret>'

kak -f doesn't work on standard input aborting with the same error message

<in kak -f 'ggQm*nWd<a-l>d<a-d>n<a-c>\fo<c-n>{<c-r>"}<esc>Q8q'

Outcome

With -e the solution works as expected , but Kakoune spits out the message

double free or corruption (out)
Aborted

kak -f with input on stdin produces no output and aborts with the message above.

Introduced with dbe8528

Expectations

Produces expected output that matches the contents of out w/o error messages and ends successfully.

Additional information

Debian 12 (bookworm)

Probably related to #5122