Parameter expansion, patterns and fnmatch

[Olof Johansson <olof@xxxxxxxx>]

Hello,

I'm seeing some discrepancies between dash built with --enable-fnmatch
and dash built without that got me curious. Maybe you could help shed
some light?

 foo='[abc]'
 echo ${foo#[}
 echo ${foo#\[}

With dash built with --enable-fnmatch:

 abc]
 abc]

With dash built without --enable-fnmatch:

 [abc]
 abc]

I was able to reproduce this behavior on latest git master
(17a5f24e0). The dash manual states:

> The end of the character class is indicated by a ]; if the ] is
> missing then the [ matches a [ rather than introducing a character
> class.

Which to me suggests that the non-fnmatch case is not the expected
behavior. Is this interpretation correct?

Thanks,
-- 
Olof Johansson                            https://github.com/olof
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