Have a look:

scope class A
{
	~this()
	{
		writefln("A dtor");
	}
}

void main()
{
	int x = 5;
	
	switch(x)
	{
		case 5:
			scope a = new A();
			scope(exit) writefln("exit");
			writefln("five");
			break;
	}
	
	switch(x)
	{
		case 5:
			goto _something;
			
		_something:
			scope a = new A();
			scope(exit) writefln("exit");
			writefln("something");
			break;
	}
}

This outputs:

five
exit
A dtor
something
exit

You'll notice the first switch works correctly -- "five", then "exit", then "A dtor" are printed, as expected.  But the second switch jumps to a label (common when you have several cases which have a common ending code) inside the switch.  In this case, the scope(exit) statement prints "exit", but the scope class's dtor is never called.

Related to 1041?