#10294: Missing instances if compiling with -fplugin -------------------------------------+------------------------------------- Reporter: jscholl | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 7.10.1 checker) | Keywords: Resolution: | Architecture: x86_64 Operating System: Linux | (amd64) Type of failure: GHC rejects | Test Case: valid program | plugins/T10294, plugins/T10294a Blocked By: 10420 | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by thomie): * status: closed => new * testcase: => plugins/T10294, plugins/T10294a * resolution: duplicate => Comment: The `pre_cmd` of T10294 and T10294a generates the following warning with a devel2 build: {{{ $ make -s --no-print-directory -C annotation-plugin package.T10294 WARNING: file compiler/specialise/Specialise.hs, line 722 specImport discarding: mapM_ :: forall a_a5Mh (m_a5Mi :: * -> *) b_a5Mj (t_a5Mk :: * -> *). (Foldable t_a5Mk, Monad m_a5Mi) => (a_a5Mh -> m_a5Mi b_a5Mj) -> t_a5Mk a_a5Mh -> m_a5Mi () want: False stable: False calls: mapM_ _ @ CoreM _ @ [] $fFoldable[] $fMonadCoreM }}} This makes the test fail for me, even when DYNAMIC_GHC_PROGRAMS=YES (my timeout program stops working for some reason when it sees unexpected output). I don't know if the warning can be ignored, so I'm reopening this ticket. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10294#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler