[dmd-beta] rdmd heisenbug

[Walter Bright]

We've got a real heisenbug going on with rdmd.

Anything that causes the memory layout of rdmd to be different causes it to 
start working. This includes running it under the debugger. This includes adding 
any printfs, compiling rdmd with the debug build of dmd, etc.

I suspect the problem is use of uninitialized memory in druntime/phobos.

Anyone have any ideas?