Reproducible lock-up

[EvilDastard]

Playing through the SP game, Chapter 2, and have found a pretty bad bug.

The room full of "acoustic" sentry turrets in the compound area seems to be the culprit. After a couple of minutes, the turrets' timing gets messed up and they begin to all fire at once instead of the normal alternating firing pattern. This eventually causes the game to lock up if you even go near the area with the turrets. The problem persists even after reloading and is 100% reproducible.