#14892: Field imposters with DuplicateRecordFields and NamedFieldPuns. -------------------------------------+------------------------------------- Reporter: philderbeast | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.4.1-alpha3 Resolution: | Keywords: ORF Operating System: MacOS X | Architecture: x86_64 Type of failure: GHC accepts | (amd64) invalid program | Test Case: Blocked By: | Blocking: Related Tickets: #13644 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by philderbeast): You beat me to the test with a later GHC version, something Ben asked me to do on #12158. I too am seeing the problem of GHC's panic fixed. I do wish however that the compiler here would pick the one `x` pun that fits. {{{ # stack.yaml resolver: ghc-8.4.0.20180118 compiler: ghc-8.4.0.20180118 compiler-check: match-exact }}} {{{
stack build ghc-panic-translateConPatVec-lookup-0.1.0: build (lib) Preprocessing library for ghc-panic-translateConPatVec-lookup-0.1.0.. Building library for ghc-panic-translateConPatVec-lookup-0.1.0.. [2 of 3] Compiling GhcPanic12158
/earth/library/GhcPanic12158.hs:9:12: error: • Constructor ‘G.X’ does not have field ‘x’ • In the pattern: G.X {x} In an equation for ‘update’: update G.X {x} = G.X {x = x} | 9 | update G.X{x} = G.X{x = x} }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14892#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler