[GHC] #14365: Panic with (bogus?) deriving in hs-boot: newTyConEtadArity
#14365: Panic with (bogus?) deriving in hs-boot: newTyConEtadArity -------------------------------------+------------------------------------- Reporter: happykitten | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- {{{ $ cat A.hs module Main where import {-# SOURCE #-} B main = return () $ cat B.hs module B where data Foo a = Foo a deriving (Functor) $ cat B.hs-boot module B where data Foo a deriving (Functor) $ ghc --make A.hs [1 of 3] Compiling B[boot] ( B.hs-boot, B.o-boot ) ghc: panic! (the 'impossible' happened) (GHC version 8.2.1 for i386-unknown-linux): newTyConEtadArity Foo Call stack: CallStack (from HasCallStack): prettyCurrentCallStack, called at compiler/utils/Outputable.hs:1133:58 in ghc:Outputable callStackDoc, called at compiler/utils/Outputable.hs:1137:37 in ghc:Outputable pprPanic, called at compiler/types/TyCon.hs:2149:27 in ghc:TyCon Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14365 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#14365: Panic with (bogus?) deriving in hs-boot: newTyConEtadArity -------------------------------------+------------------------------------- Reporter: happykitten | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: deriving Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4102 Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * status: new => patch * keywords: => deriving * differential: => Phab:D4102 Comment: Well that's embarrassing. The [http://git.haskell.org/ghc.git/blob/317aa966b3d89e45227a5870feba339e34d77a18... GHC users' guide] states that you can't have derived instances in `.hs- boot` files, but clearly we weren't checking for this in practice. Phab:D4102 is an attempt to do so. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14365#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#14365: Panic with (bogus?) deriving in hs-boot: newTyConEtadArity
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Reporter: happykitten | Owner: (none)
Type: bug | Status: patch
Priority: normal | Milestone:
Component: Compiler | Version: 8.2.1
Resolution: | Keywords: deriving
Operating System: Unknown/Multiple | Architecture:
| Unknown/Multiple
Type of failure: None/Unknown | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s): Phab:D4102
Wiki Page: |
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Comment (by Ryan Scott
#14365: Panic with (bogus?) deriving in hs-boot: newTyConEtadArity -------------------------------------+------------------------------------- Reporter: happykitten | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: 8.4.1 Component: Compiler | Version: 8.2.1 Resolution: fixed | Keywords: deriving Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | deriving/should_fail/T14365 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4102 Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * status: patch => closed * testcase: => deriving/should_fail/T14365 * resolution: => fixed * milestone: => 8.4.1 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14365#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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