[commit: ghc] wip/gadtpm's head updated: Add & adjust tests for pattern match check (1c3542f)

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Repository : ssh://git@git.haskell.org/ghc

Branch 'wip/gadtpm' now includes:

     c4308b4 rts/Pool: Add poolTryTake
     1712a9e LibdwPool: Use poolTryTake
     ba14f04 Libdw: Handle failure to grab session for location lookup
     d25f853 Update transformers submodule
     49aae12 Check arity on default decl for assoc types
     583867b Update haskeline & terminfo submodules
     85fcd03 Implement new -XTemplateHaskellQuotes pragma
     72e3620 ghci: Add support for prompt functions
     55c737f ghc-pkg: print version when verbose
     399a5b4 Remove deprecated quasiquoter syntax.
     71c0cc1 GHCi should not defer typed holes
     54a9456 Update containers submodule
     616aceb Update deepseq submodule
     5897213 Remove redundant `#if`s
     f101a82 ghci: Refactor handling of :show
     bcd55a9 Some improvements on CoreToDos passed to plugins
     290def7 Implement warnings for Semigroups as parent of Monoid
     afb7213 MkId: Typos in comments
     14d0f7f Build system: Add stage specific SRC_HC_(WARNING_)OPTS
     6dce643 Fix grammar and typo in TcTyDecls
     36c1247 Remove duplicated line
     44c3e37 Fix warning about unused pattern variable
     b432e2f Make the determinism tests more robust
     1e041b7 Refactor treatment of wildcards
     8a0eb7e Pattern Match Checking (Fixes #595)
     1c3542f Add & adjust tests for pattern match check