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Date:	Wed, 27 Jun 2007 06:05:50 -0600
From:	Eric Blake <ebb9 AT byu DOT net>
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To:	Richard A Nelson <cowboy AT linux DOT vnet DOT ibm DOT com>
CC:	cygwin AT cygwin DOT com
Subject:	Re: Bash is broken wrt trap :(
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According to Richard A Nelson on 6/27/2007 12:48 AM:
> OS=AIX
> bash=3.00.16(1)-release
>
> OS=Linux      << RH EL WS 4 (Nahant)
> bash=3.00.15(1)-release

Just as I suspected.  You are comparing apples to oranges.  Until you run
bash 3.2 on all machines, you can't be sure that it was an intentional
upstream change between bash 3.0 and 3.2, rather than a cygwin-specific
compilation botch.

> However, the return trap is defined to execute in the context of the
> caller, after the called function has completed...   and since all it
> does is execute
> 'false', it does cause the parents ERR trap to trigger, and things go
> pretty smoothly (on some machines).

All that man bash says is "If a sigspec is RETURN, the command arg is
executed each time a shell function or a script executed with the . or
source builtins finishes executing".  It doesn't say whether the trap is
run in the context of the function or of the caller.  This is not
cygwin-specific - you will need to take your report upstream to the bash
maintainer.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9 AT byu DOT net
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