Completion vs. overloads (or something)

[Simn]

Modified from #11236 (comment):

import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.lang.Runnable;

final exec = Executors.newSingleThreadScheduledExecutor();

function schedule(f:() -> Void)
	exec.schedule(f, 0, TimeUnit.MILLISECONDS);

function greeter():Void {
	trace("hello");
	exec.shutdown();
}

function main() {
	schedule(greeter);

	exec.
}

This doesn't give any completion. Adding @:debug.display shows that it just randomly ends:

before processing:
 339- 370 EBlock
 342- 359   ECall
 342- 350     schedule
 351- 358     greeter
 367- 368   EDisplay DKDot
 363- 367     exec

after processing:
 339- 370 EBlock
 342- 359   ECall
 342- 350     schedule
 351- 358     greeter
 367- 368   EDisplay DKDot
 363- 367     exec

Probably related to the exec.schedule call because using cast f there makes it work.

[Simn]

I think this is a cache-problem with ctx.g.functional_interface_lut not being populated when modules are restored from the cache.

[Simn]

I'll fix this on #11544 because that's easier.

A test would be good, too.