When emitting jump instructions for breaking out of for-loops, the compiler
incorrectly set the jump target before the pop instruction clearing the
intermediate loop variables. Since the break instruction itself already
compiles to a series of pop instructions reverting the stack to it's the
pre-loop state, intermediate values got popped twice, leading to a stack
layout mismatch between compiler and VM, resulting in wrong local variable
values or segmentation faults at runtime.

-- Testcase --
{%
	let x = 1;

	for (let y in [2])
		break;

	let z = 3;

	print([ x, z ], "\n");
%}
-- End --

-- Expect stdout --
[ 1, 3 ]
-- End --


-- Testcase --
{%
	let x = 1;

	for (let y = 0; y < 1; y++)
		break;

	let z = 3;

	print([ x, z ], "\n");
%}
-- End --

-- Expect stdout --
[ 1, 3 ]
-- End --