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Re: bash-4.0: parser complains on `|& {}' statement


From: Chet Ramey
Subject: Re: bash-4.0: parser complains on `|& {}' statement
Date: Wed, 25 Feb 2009 17:29:51 -0500
User-agent: Thunderbird 2.0.0.19 (Macintosh/20081209)

Evgeniy Zhemchugov wrote:
> Configuration Information
> Machine: x86_64
> OS: linux-gnu
> Compiler: gcc
> Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-unknown-linux-gnu'
> -DCONF_VENDOR='unknown' -DLOCALEDIR='/usr/share/locale'
> -DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H   -I.  -I. -I./include
> -I./lib   -march=nocona -O2 -pipe -mtune=generic
> uname output: Linux LFS 2.6.25.17 #7 SMP PREEMPT Tue Jan 20 22:40:20
> MSK 2009 x86_64 Intel(R) Core(TM)2 CPU          6300  @ 1.86GHz
> GenuineIntel GNU/Linux
> Machine Type: x86_64-unknown-linux-gnu
> 
> Bash Version: 4.0
> Patch Level: 0
> Release Status: release
> 
> Description:
>       Look at the following bash session:
> 
>         $ { echo a; } |& { read a; echo "read: $a"; }
>         bash: syntax error near unexpected token `}'
> 
>         Expected behavior:
> 
>         $ { echo a; } |& { read a; echo "read: $a"; }
>         read: a
> 
>         It works correctly with `2>&1 |' instead of `|&' or when the
>         right side does not contain braces. For example:
> 
>         $ f() { read a; echo "read: $a"; }
>         $ { echo a; } |& f
>         read: a

Try the attached patch; it works for me.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer

Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/
*** ../bash-4.0/parse.y 2009-01-08 08:29:12.000000000 -0500
--- parse.y     2009-02-25 17:25:56.000000000 -0500
***************
*** 4450,4453 ****
--- 4457,4461 ----
      case AND_AND:
      case BANG:
+     case BAR_AND:
      case DO:
      case DONE:

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