Currently `error_regex` is only documented under `[build_settings]`, and I've found that doesn't work when there's also a `[build-menu]` section in a user filetype file. You can view, comment on, or merge this pull request online at:
https://github.com/geany/geany/pull/2257
-- Commit Summary --
* [docs] Move error_regex section to [build-menu]; add filetype example
-- File Changes --
M doc/geany.txt (55)
-- Patch Links --
https://github.com/geany/geany/pull/2257.patch https://github.com/geany/geany/pull/2257.diff