Silent error when using hashmap

[FatalCatharsis via Digitalmars-d]

I apologize, I'm not sure if this is expected behavior, a bug in 
the compiler, or a bug in the core windows libraries, so I'll 
post this here until pointed elsewhere.

I've done this trick with win32 for awhile in other languages 
where I pass a reference to a specific class of my own that 
represents an instance of window to the CreateWindowEx function, 
and then use a static router function to send messages to the 
specific instance. I've made the most minimal example I can in 
this gist.

https://gist.github.com/FatalCatharsis/d3cc6ec621f0600975806fe23610ae32

When I compile this and run this, nothing is printed and no 
window is created. I've tried putting try catches around 
everything (including the inside of the static constructor), but 
nothing is caught.

However, when I comment out the hash lookup on line 54, the 
compiled program runs fine and creates a window, (but only for a 
moment since there is not a message handling loop). The expected 
printout of "start" and "end" occurs just fine.

What is happening here that causes the program not execute at 
all, with no output and no exceptions? Is this a bug with my 
code, a bug with the core.sys.windows.windows library, or a bug 
with the compiler? Any info about how to debug this further is 
greatly appreciated.