Fix "exec" call depth and "exec" never returning to script #8852
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Motivation / Problem
See #8851. Two problems are mentioned:
This PR fixes both problems at the same time.
Description
"exec" uses a global
bool
, which limits what you can do. Making that a depth variable solves both issues nicely.Limitations
Checklist for review
Some things are not automated, and forgotten often. This list is a reminder for the reviewers.