compiler: Function return values (?) not life-time-tracked

[dnadlinger]

Escape the confines of the ARTIQ compiler escape analysis with this one neat trick - infinite memory corruption at your fingertips!

@kernel
def leak(a):
    return a

class LeakTest(EnvExperiment):
    def build(self):
        self.setattr_device("core")

    @kernel
    def run(self):
        # Fails to compile as it should:
        #     return [1, 2, 3]
        # However…
        return leak([1, 2, 3])

(This kernel shouldn't compile, but does on e4b1642.)

[dnadlinger]

@pathfinder49 One to add to the list…

[dnadlinger]

Reopening, as fix was reverted in ae999db (see commit message for details).