id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc
23	Case statement, pattern guard, comma indentation	heatsink	Baughn	"Commas in pattern guards inside case statements produce parse errors that prevent indentation.  On the other hand, commas in pattern guards on function definitions don't cause the error.  Using version 2.8.0.

{{{
-- Parse error after comma
foo maybex maybey =
  case maybex
  of Just x
       | Just y <- maybey,
         y > 0 ->
           x + y

-- No error after comma
foo x maybey
  | Just y <- maybey,
    y > 0 =
      x + y
}}}"	defect	new	major	haskell-indentation			pattern guard, case, comma