id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
92	Better error message when trying to define an instance of an unknown class	benl	benl	"
instance Wibble a where
  ...

If Wibble is not in scope, the compiler panics."	defect	closed	blocker	0.1.3	Source Parser	0.1.2	fixed