[Octave-bug-tracker] [bug #35910] Incorrect regex matching of multi-byte UTF-8 characters

[Mike Miller]

Follow-up Comment #13, bug #35910 (project octave):

I'm seeing some strange regressions with this change in a minimal container
running Octave with some regular expressions containing UTF-8 characters (in
the doctest package).

Example regexerror.m:


c = regexp ('lorem ipsum', '^\s*(⇒|=>|⊣|-\|)', 'lineanchors');



$ octave regexerror.m
error: regexp: unrecognized character after (? or (?- at position 13 of
expression
error: called from
    regexerror at line 1 column 3


I get different results depending on whether this script is run from the
command shell or in an interactive Octave, and whether the environment
contains LANG or LC_??? variables containing UTF-8 or not. This suggests that
there is something I could configure or install in my environment to fix this,
but I have no idea what that is at the moment. Any ideas?

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