Comment 29 for bug 1294669

The trusty-proposed patch works for me, too.

Testcase:
1. Fresh install of 32bit Ubuntu 14.04

Before the patch:
$ bash
$ echo $BASH_VERSION
4.3.8(1)-release

$ ls
$ !
$ <ENTER>

malloc: /usr/homes/chet/src/bash/src/parse.y:2314: assertion botched
realloc: start and end chunk sizes differ
last command: !
Aborting...Aborted (core dumped)

To install the fix:
1. Enable trusty-proposed
2. apt-get install bash

After the patch installation: Start a new bash process:
$ bash
$ echo $BASH_VERSION
4.3.11(1)-release

$ ls
$ !
$ <ENTER>
$ <ENTER>
$ <ENTER>

Stable - no more crash :-)