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History substitution fails after semi-colon pound

From: Josh Harding
Subject: History substitution fails after semi-colon pound
Date: Tue, 17 Dec 2013 10:46:26 -0600

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  -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe
-fstack-protector --param=ssp-buffer-size=4
-DSTANDARD_UTILS_PATH='/usr/bin' -DSYS_BASHRC='/etc/bash.bashrc'
uname output: Linux astro 3.12.5-1-ARCH #1 SMP PREEMPT Thu Dec 12
12:57:31 CET 2013 x86_64 GNU/Linux
Machine Type: x86_64-unknown-linux-gnu

Bash Version: 4.2
Patch Level: 45
Release Status: release

        History substitution fails after a semi-colon and pound sign
on a command line.

        echo foo
        echo ";" !$
        echo "#" !$
        echo "#;" !$
        echo ";#" !$   ### This one prints !$ instead of foo

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