Should struct destructors be required to be @nogc?

[bachmeier]

I recently had an invalid memory operation error, and given how 
vague that message is, I had no idea where to look for the 
problem. The problem was string concatenation in a struct 
destructor. My feeling is that destructors should always be 
@nogc, because if it's not, you've done something wrong and your 
program might unexpectedly crash.

After solving the problem, I came upon [this 
page](https://wiki.dlang.org/InvalidMemoryOperationError). If the 
error message had at least included a link to that page, it would 
have saved me a lot of time.