bug#7227: re-search-forward goes infinite loop with dash inside []

[Andreas Schwab]

Jari Aalto <jari.aalto@cante.net> writes:

> Executing the following code causes Emacs to go into infinite loop.
> Simply run it behind the last paren with C-x C-e
>
> (re-search-forward "^\\([a-z0-9.-]+\\)+[ \t]+\\([0-9]+\\) +\\([a-z].*\\)")

Works fine here.

Note that nested repetitions like \([...]+\)+ are bad in any case.

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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