pg gem '0.14.0' on Mountain Lion fails

Question

I just upgraded from OS X Lion to OS X Mountain Lion. My rails environment for the most part stayed in tact.

The only steps I had to do to get things back to a good

Answer 1

I had the exact same issue; same stack trace as you've posted.

MRI 1.9.3-p286 / OS X 10.8.2 / Postgres 9.0.4 with homebrew.

I solved it by simply doing:

$ brew update
$ brew upgrade postgresql
$ bundle

Hope it works for someone else.