D-Programming-Language/dmd — pull request #1135 by 9rnsr (2012-09-22 18:22:22+00:00)
Title: Issue 8496 - Assignment of function literal to function pointer variable with non-D linkage broken

http://d.puremagic.com/issues/show_bug.cgi?id=8496

I think that lambda type inference should prefer required linkage.