Compiler warning on implicit return statement

The following code does not issue a compiler warning.

class freakyfred:
public X = 1

def dangerDoom(var as bool):
if var:
return freakyfred()

print dangerDoom(true) #not null
print dangerDoom(false) #null

Since the "default value" of a reference type is going to be null, this can be a serious ass-biter. Compiler warnings would be pleasant.