Several people have been having issues with memory corruption with version 2.042, and with a repeatable test case, I was able to find a bug that was in 2.042.

A patch to fix this problem is here: http://www.dsource.org/projects/druntime/changeset/282?format=diff&new=282

Please apply this patch if you need this fix right away, it will be in the next version of dmd.  I expect this will happen soon.

Sorry for the inconvenience, hopefully this is the last one...

-Steve