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Incorrect process substitution when brace expansion is used inside it.


From: Rajeev V. Pillai
Subject: Incorrect process substitution when brace expansion is used inside it.
Date: Wed, 17 Dec 2008 08:41:11 +0530 (IST)
User-agent: Alpine 2.00 (LNX 1167 2008-08-23)

Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i686' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu' 
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib   -O2 -fomit-frame-pointer 
-ftree-vectorize -march=native -mfpmath=sse -m3dnow -mmmx -msse -pipe
uname output: Linux athlon.localdomain 2.6.27 #1 PREEMPT Sat Nov 29 01:23:01 
IST 2008 i686 GNU/Linux
Machine Type: i686-pc-linux-gnu

Bash Version: 3.2
Patch Level: 48
Release Status: release

Description:
        Bash 3.2.48(1)-release does incorrect process substitution when
        brace expansion is used inside a process substitution.

Repeat-By:
        $ echo <( echo hello{0{1,6,9},10}.txt ) <( echo world{0{1,6,9},10}.txt )

                produces (note: 8 processes corresponding to the 8 words 
resulting from
                the brace expansion above):

        /dev/fd/63 /dev/fd/62 /dev/fd/61 /dev/fd/60 /dev/fd/59 /dev/fd/58 
/dev/fd/57 /dev/fd/56

                when it should produce only 2 processes (as ksh (AT&T Research) 
93t 2008-11-04 does):

        /dev/fd/63 /dev/fd/62




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