[GHC] #12033: [TypeApplications] GHC internal error
#12033: [TypeApplications] GHC internal error -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Keywords: | Operating System: Unknown/Multiple TypeApplications | Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Toying around, got {{{ GHCi, version 8.1.20160503: http://www.haskell.org/ghc/ :? for help [1 of 1] Compiling Main ( /tmp/CatFail.hs, interpreted ) /tmp/CatFail.hs:55:26: error: • GHC internal error: ‘a’ is not in scope during type checking, but it passed the renamer tcl_env of environment: [a1Ej :-> Type variable ‘i’ = i, a1Ek :-> Type variable ‘p’ = p, a1Et :-> Type variable ‘a’ = a, a1Eu :-> Type variable ‘b’ = b] • In the first argument of ‘Vacuous’, namely ‘a’ In the type ‘Vacuous a’ In the expression: Dict @(Vacuous a) /tmp/CatFail.hs:66:10: error: • Couldn't match type ‘Fun p q’ with ‘Vacuous’ arising from a use of ‘Main.$dmsrc’ • In the expression: Main.$dmsrc In an equation for ‘src’: src = Main.$dmsrc In the instance declaration for ‘Category (Nat p q)’ • Relevant bindings include src :: Nat p q a b -> Dict (Ob (Nat p q) a) (bound at /tmp/CatFail.hs:66:10) Failed, modules loaded: none. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12033 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#12033: [TypeApplications] GHC internal error -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: | Keywords: | TypeApplications Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by Iceland_jack): * Attachment "CatFail.hs" added. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12033 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#12033: [TypeApplications] GHC internal error -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: | Keywords: | TypeApplications Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by sjcjoosten): * Attachment "HaskellBug.hs" added. Small example with similar behavior -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12033 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#12033: [TypeApplications] GHC internal error -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: | Keywords: | TypeApplications Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by sjcjoosten): I ran into this too, I'm not sure whether it is the same bug, but I managed to reproduce the same GHC internal error in a very small example. Based on what the two examples have in common, I would say this has something to do with the TypeFamilies switch (without it, ghc works as expected). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12033#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#12033: [TypeApplications] GHC internal error -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: | Keywords: | TypeApplications Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): `CatFail.hs` fails with {{{ T12033a.hs:45:31: error: Not in scope: type constructor or class ‘Dict’ }}} so perhaps the test isn't right. Anyway, I think #12055, which does reproduce, is a simpler test case. On the other hand `HaskellBug.hs` really is a new and quite different bug. Patch coming for that. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12033#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#12033: [TypeApplications] GHC internal error
-------------------------------------+-------------------------------------
Reporter: Iceland_jack | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 8.1
Resolution: | Keywords:
| TypeApplications
Operating System: Unknown/Multiple | Architecture:
| Unknown/Multiple
Type of failure: None/Unknown | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s):
Wiki Page: |
-------------------------------------+-------------------------------------
Comment (by Simon Peyton Jones
#12033: [TypeApplications] GHC internal error -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: fixed | Keywords: | TypeApplications Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: partial- | sigs/should_compile/T12033 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonpj): * testcase: => partial-sigs/should_compile/T12033 * status: new => closed * resolution: => fixed Comment: With the above patch, `HaskellBug` problem is fixed. I've added it as a regression test. That leaves #12055, which we'll handle on that ticket, so I'm closing this one. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12033#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
participants (1)
-
GHC