	0	0	5	null
	10	1	1	
	20	4	1	X.A?(X.a)
	20	6	2	AS.S!(12)
	20	5	1	X.B?(X.b)
	20	10	3	BS.S!(9)
	30	3	1	
ERROR: symbol `my_gcd' not found in presently loaded modules.
Error resolving symbol of nonmeta function call.
Run-time error calling function: my_gcd(my_gcd::a,my_gcd::b)
Run-time error writing channel: X.G!(my_gcd(X.a,X.b))
Run-time error while checking event.
event[2]:	40	2	1	X.G!(my_gcd(X.a,X.b))	[by:3]
Caught run-time exception during execution.  Halting.
... at line 6
