id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
7245	INLINEing top-level patterns causes ghc to emit 'arity missing' traces	jwlato		"When an INLINE pragma is specified on a pattern, ghc-7.6.1 shows some internal trace messages.

{{{
module Foo where

{-# INLINE widths #-}

widths :: [Int]
widthMonth, widthYear :: Int

widths@[widthMonth, widthYear] = [1,2]
}}}

{{{
~/Downloads$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.6.1
~/Downloads$ ghc Foo.hs -O
[1 of 1] Compiling Foo              ( Foo.hs, Foo.o )
makeCorePair: arity missing widths{v aeJ} [lid]
}}}

I'm not certain that specifying an INLINE pragma in this context even makes sense, in which case perhaps a more useful warning could be produced."	bug	new	normal	7.8.1	Compiler	7.6.1			jwlato@…	Unknown/Multiple	Unknown/Multiple	None/Unknown	Unknown