Issue 8078 - receiveOnly exceptions should be informative

[ghost]

http://d.puremagic.com/issues/show_bug.cgi?id=8078

Odd that there were no unittests for receiveOnly.

[ghost]

Btw, some messages won't look pretty but will at least be informative:

Unexpected message type: expected '(string, int)', got 'std.typecons.Tuple!(int, int).Tuple'

Can't do much about that, unless someone knows of a better way to peek at the Variant type and extract a nice-looking string representation.

[alexrp]

Failing on Win32.

[ghost]

I see what's going on, I had a dangling send statement after the catch.

[ghost]

Tests now pass.