#11356: GHC panic --------------------------------------------+--------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type checker) | Version: 8.1 Resolution: | Keywords: Operating System: Linux | Architecture: x86 Type of failure: Compile-time crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | --------------------------------------------+--------------------------- Changes (by Iceland_jack): * Attachment "Foo.hs" added. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11356 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#11356: GHC panic -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.1 checker) | Resolution: | Keywords: TypeInType Operating System: Linux | Architecture: x86 Type of failure: Compile-time | Test Case: crash | Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by mpickering): * keywords: => TypeInType -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11356#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#11356: GHC panic -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.1 checker) | Resolution: | Keywords: TypeInType Operating System: Linux | Architecture: x86 Type of failure: Compile-time | Test Case: crash | Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones ): In [changeset:"a5cea73c658888e01c162723d3e0e1439514ecdb/ghc" a5cea73c/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="a5cea73c658888e01c162723d3e0e1439514ecdb" Turn AThing into ATcTyCon, in TcTyThing This change tidies up and simplifies (a bit) the knot-tying when kind-checking groups of type and class declarations. The trouble (shown by Trac #11356) was that we wanted an error message (a kind-mismatch) that involved a type mentioned a (AThing k), which blew up. Since we now seem to have TcTyCons, I decided to use them here. It's still not great, but it's easier to understand and more robust. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11356#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#11356: GHC panic -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: merge Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: | Keywords: TypeInType Operating System: Linux | Architecture: x86 Type of failure: Compile-time | Test Case: crash | typecheck/should_fail/T11356 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonpj): * milestone: => 8.0.1 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11356#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#11356: GHC panic -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: fixed | Keywords: TypeInType Operating System: Linux | Architecture: x86 Type of failure: Compile-time | Test Case: crash | typecheck/should_fail/T11356 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): Great -- thanks. I had been wanting to do a similar refactoring now that we have `TcTyCon`. I actually think there's even more we can do here, reducing the knot to including only the final zonk. Zonking a tycon would just look up the loopy tycon. But no more knot-tied tycons during typechecking and no more `mkNakedXXX` functions. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11356#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler