id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
150	PANIC in Type.Location	erikd		"Code

{{{
a :: Int
a = 0

b :: Int %r0
  :- Mutable %r0
b = 0

main ()
= do	println $ show b
	b := 1
	println $ show b
	a := 1
}}}

Results in a panic:

{{{
ddc: PANIC in Type.Location
    dispSourcePos: no source location in TSI SICrushedF 162 (Base.MutableT *150)
    Please report this bug to the maintainers at:
        http://trac.haskell.org/ddc
        or by emailing disciple-cafe@googlegroups.com
}}}
"	defect	closed	blocker	0.1.3	Core Type Checker	0.1.2	fixed