@nogc

[Manu via Digitalmars-d]

So, we allow assert() in nothrow functions, the argument is that
assert is non-recoverable, so it's distinct from user exceptions.

I have this in my 'nothrow @nogc' function:
  assert(false, "Message " ~ details);

It complains "Error: cannot use operator ~ in @nogc function"

I think it should be allowed to invoke the GC for formatting error
messages inside of assert statements, just the same as assert() is
allowed inside of nothrow functions.

Thoughts?