Error: @nogc function 'test.func2' cannot call non- at nogc delegate 'msg'

[Shachar Shemesh]

On 10/12/17 13:44, Jonathan M Davis wrote:
> it sounds like the delegate that's
> being generated isn't @nogc, so it can't be called within the function,
> which would be a completely different issue from allocating a closure.

Here's the thing, though. There is no reason for the delegate to be 
called at all!

Since func1's msg is also lazy, I expected the lowering to look like this:

void func1(/*scope*/ string delegate() msg) @nogc {
}

void func2(/*scope*/ string delegate() msg) @nogc {
   func1(msg);
}

Even with scope commented out, the above compiles just fine. The fact 
that msg is not @nogc doesn't matter at all, simply because no one is 
evaluating the delegate.