SafeRefCounted features a `@system` constructor

[0xEAB]

std/typecons.d(7895):        and assigning scope variable `val` to non-scope parameter `source` calling `move` makes it fail to infer `@safe`
std/typecons.d(7893):        `std.typecons.SafeRefCounted!(FooBar, RefCountedAutoInitialize.yes).SafeRefCounted.this` is declared here

phobos/std/typecons.d

Lines 7893 to 7896 in 24711b9

	this(return scope T val)
	{
	_refCounted.move(val);
	}

I wouldn’t be surprised if this issue were only to occur under certain circumstances, but the error message is unfortunately not helpful.