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bug#20977: 24.5; Hi Lock Mode fails with "Invalid pattern list expressio
bug#20977: 24.5; Hi Lock Mode fails with "Invalid pattern list expression"
Sat, 04 Jul 2015 16:46:27 +0200
Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)
Raffaele Ricciardi <address@hidden> writes:
> emacs -Q
> C-h f hi-lock-mode RET
> C-x b *Help* RET
> M-x hi-lock-mode RET
> Emacs says:
> Invalid pattern list expression at 60
AFAIK this is not an error, just a message (that you can safely ignore).
The mode is enabled nonetheless and should work as expected.
Background: There is a feature that hi-lock-mode searches for pattern
specifications of the kind
that define initial highlightings.
Since the help buffer of `hi-lock-mode' explains this feature, it
contains a match for the regexp searched for (namely "Hi-lock: FOO") but
hi-lock-mode discards it because it is invalid (thus the message). So
this issue is only a coincidence appearing only in the help buffer of
`hi-lock-mode'. FWIW I can live with this message in this special case,
though I agree that it is confusing.