[GHC] #9181: :browse GHC.TypeLits causes panic
#9181: :browse GHC.TypeLits causes panic ------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: GHCi crash Difficulty: Unknown | Test Case: T9181 Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- Upon `:browse GHC.TypeLits` I get: {{{ ghc-stage2: panic! (the 'impossible' happened) (GHC version 7.9.20140606 for x86_64-unknown-linux): toIfaceDecl: BuiltInFamTyCon * Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9181 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#9181: :browse GHC.TypeLits causes panic
-------------------------------------+------------------------------------
Reporter: nomeata | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.8.2
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture: Unknown/Multiple
Type of failure: GHCi crash | Difficulty: Unknown
Test Case: T9181 | Blocked By:
Blocking: | Related Tickets:
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Comment (by Joachim Breitner
#9181: :browse GHC.TypeLits causes panic -------------------------------------+------------------------------------ Reporter: nomeata | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: GHCi crash | Difficulty: Unknown Test Case: T9181 | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by nomeata): This is caused by {{{ to_ifsyn_rhs (BuiltInSynFamTyCon {}) = pprPanic "toIfaceDecl: BuiltInFamTyCon" (ppr tycon) }}} in `tyConToIfaceDecl`. Of course we don’t want `BuiltInSynFamTyCon` in interface files, but we use `tyConToIfaceDecl` (via `pprTyThing`) also for pretty-printing. So this function needs to be made “totaler”. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9181#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#9181: :browse GHC.TypeLits causes panic
-------------------------------------+------------------------------------
Reporter: nomeata | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.8.2
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture: Unknown/Multiple
Type of failure: GHCi crash | Difficulty: Unknown
Test Case: T9181 | Blocked By:
Blocking: | Related Tickets:
-------------------------------------+------------------------------------
Comment (by Joachim Breitner
#9181: :browse GHC.TypeLits causes panic -------------------------------------+------------------------------------ Reporter: nomeata | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: GHCi crash | Difficulty: Unknown Test Case: T9181 | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by nomeata): * status: new => closed * resolution: => fixed -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9181#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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