#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