id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
7489	Obscure warning: Var/Type length mismatch when using GADTs and TypeFamilies	portnov		"GHC 7.4.2 and 7.6.1 both write obscure warning without any link to source line:

{{{
$ ghc --make test.hs
[1 of 1] Compiling Main             ( test.hs, test.o )
Var/Type length mismatch: 
    []
    [main:Main.Credit{tc ra2}]
Var/Type length mismatch: 
    []
    [main:Main.Debit{tc ra1}]
Linking test ...
}}}

Near to minimal example (my real program is quite big and uses GHC type system a lot): http://hpaste.org/78958

GHC 7.4.2 output: http://hpaste.org/78959

GHC 7.6.1 output: http://hpaste.org/78961"	bug	closed	normal		Compiler	7.6.1	fixed			Unknown/Multiple	Unknown/Multiple	Incorrect warning at compile-time	Unknown	indexed_types/should_compile/T7489