directory tracking on ansi-term broken

[Jacob Oursland]

Hi All,

I'm using a snapshot build from April 19th, version 201504190846 from the
Ubuntu PPA https://launchpad.net/~ubuntu-elisp/+archive/ubuntu/ppa.  I
recently restarted my Emacs instance, which had been running for who knows
how long (probably months), to address an out of control memory problem in
a dependency application (ibus).  Since then, ansi-term will no longer
perform directory tracking.

My inferior shell is bash.  I have confirmed that this problem exists with
'emacs -Q'.  Re-setting my PS1 to the bash default PS1='\h:\w\$ ' and
starting Emacs didn't help either.

Steps to reproduce:
1. emacs -Q
2. M-x ansi-term RET RET
3. cd /tmp (or any other directory)
4. C-x C-f

Expected behavior:
Emacs will indicate the shell's working directory (/tmp) in the find-file
minibuffer prompt.

Actual behavior:
Emacs indicates the Emacs working directory working directory ($HOME, for
me) in the find-file minibuffer prompt.

Can anyone confirm or provide a fix for this?

Thanks,
Jake