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Incorrect mangling of multiline array assignment in history


From: Davide Brini
Subject: Incorrect mangling of multiline array assignment in history
Date: Mon, 04 Jun 2012 18:42:20 +0200

Configuration Information [Automatically generated, do not change]:
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=x86-64 
-mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 
-D_FORTIFY_SOURCE=2 
-DDEFAULT_PATH_VALUE='/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin'
 -DSTANDARD_UTILS_PATH='/usr/bin:/bin:/usr/sbin:/sbin' 
-DSYS_BASHRC='/etc/bash.bashrc' -DSYS_BASH_LOGOUT='/etc/bash.bash_logout'
uname output: Linux beaker 3.3.7-1-ARCH #1 SMP PREEMPT Tue May 22 00:26:26 CEST 
2012 x86_64 GNU/Linux
Machine Type: x86_64-unknown-linux-gnu

Bash Version: 4.2
Patch Level: 29
Release Status: release

Description:
        To insert them in the history, bash converts multiline commands into a 
single line, normally replacing newlines with semicolons. However, if the 
multiline command happens to be an array assignment, adding the semicolon isn't 
always correct.

Repeat-By:

I'm not sure exactly when it happens, however this seems to more or less 
trigger it regularly:

$ xxx=(a b c d
> )

(we hit enter after the "d", to complete the assignment on the next line. ">" 
is the PS2 prompt)

$ declare -p xxx
declare -a xxx='([0]="a" [1]="b" [2]="c" [3]="d")'

Now hit up arrow twice to recall the array assignment and we get this:

$ xxx=(a b c d; )
-bash: syntax error near unexpected token `;'

Fix:
        No idea!



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