[vim/vim] Vim9: listener_add() fails when given only a callback (PR #21116)

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h_east

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Aug 21, 2026, 2:08:02 PM (5 days ago) Aug 21

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Problem:  In Vim9 script, listener_add() given only a callback fails
          with "E1212: Bool required for argument 3".
Solution: Check the third argument only when the second one is there.
          Without a second argument the third is not filled in, so
          what was checked was whatever happened to be in that slot.

You can view, comment on, or merge this pull request online at:

https://github.com/vim/vim/pull/21116

Commit Summary

cbebd96 Vim9: listener_add() fails when given only a callback

File Changes

(2 files)

M src/change.c (3)
M src/testdir/test_listener.vim (24)

Patch Links:

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Christian Brabandt

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Aug 23, 2026, 3:45:21 PM (3 days ago) Aug 23

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chrisbra left a comment (vim/vim#21116)

thanks

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