http://bugs.winehq.org/show_bug.cgi?id=20799
--- Comment #79 from Chris chris.kcat@gmail.com 2010-06-04 03:47:22 --- It's not actually using PortAudio that's the problem. The lib apparently doesn't like being unloaded/deinitialized and reloaded/reinitialized all the time, so even if the PortAudio backend is never used, the lib still gets loaded/initialized and unloaded/deinitialized when enumerating devices and eventually triggers the bug.
The drivers= line in the ~/.alsoftrc config file will prevent the PortAudio backend from being used at all, so it won't be probed and the lib won't ever be loaded or initialized.