It happens in any place where it's possible to use format strings; e.g., in Writer's Date fields. These steps use Calc as an example.
0. Use DBGUTIL build.
1. In a Calc document, open Cell Format dialog.
2. Start typing the format string MMMM""
Assertion is failed as soon as the last doublequote is typed -> crash.
Created attachment 173143 [details]
A test document failing in current dbgutil builds
Mike Kaganski committed a patch related to this issue.
It has been pushed to "master":
tdf#143032: Check if the literal is empty
It will be available in 7.3.0.
The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.