Tuple to tuple conversion

[Ali Çehreli]

Simen kjaeraas wrote:

 > "dmd a b -unittest" works. "dmd b a -unittest" does not.

This may explain a problem that I hit recently.

I had had all of a program's code in a single file. Then I started 
pulling classes to their respective source files one by one. As I did 
that, of course I compiled and run the application to see that 
everything still worked.

At some point, even though all the unittest blocks were commented out, 
compiling with -unittest would cause a segmentation fault in the built 
application.

The problem went away as I pulled more classes out of the main source file.

Ali