[GHC] #10600: -fwarn-incomplete-patterns doesn't work with -fno-code

[GHC]

#10600: -fwarn-incomplete-patterns doesn't work with -fno-code
-------------------------------------+-------------------------------------
        Reporter:  akio              |                Owner:  ezyang
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.1
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:  driver/T8101b
      Blocked By:                    |             Blocking:
 Related Tickets:  #8101             |  Differential Rev(s):  Phab:D1278
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * status:  new => patch


Old description:

> `-fwarn-incomplete-patterns` doensn't seem to generate any warnings when
> `-fno-code` is specified.
>
> To reproduce, save this module as `foo.hs`.
>
> {{{#!hs
> module Foo where
> foo True = 4
> }}}
>
> and compile with `-fwarn-incomplete-patterns`, with and without `-fno-
> code`.
>
> {{{
> % ghc -fwarn-incomplete-patterns -fforce-recomp foo.hs
> [1 of 1] Compiling Foo              ( foo.hs, foo.o )
>
> foo.hs:2:1: Warning:
>     Pattern match(es) are non-exhaustive
>     In an equation for ‘foo’: Patterns not matched: False
> % ghc -fwarn-incomplete-patterns -fforce-recomp -fno-code foo.hs
> [1 of 1] Compiling Foo              ( foo.hs, nothing )
> %
> }}}

New description:

 `-fwarn-incomplete-patterns` doesn't seem to generate any warnings when
 `-fno-code` is specified.

 To reproduce, save this module as `foo.hs`.

 {{{#!hs
 module Foo where
 foo True = 4
 }}}

 and compile with `-fwarn-incomplete-patterns`, with and without `-fno-
 code`.

 {{{
 % ghc -fwarn-incomplete-patterns -fforce-recomp foo.hs
 [1 of 1] Compiling Foo              ( foo.hs, foo.o )

 foo.hs:2:1: Warning:
     Pattern match(es) are non-exhaustive
     In an equation for ‘foo’: Patterns not matched: False
 % ghc -fwarn-incomplete-patterns -fforce-recomp -fno-code foo.hs
 [1 of 1] Compiling Foo              ( foo.hs, nothing )
 %
 }}}

--

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10600#comment:13>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler