[GHC] #15002: Panic: collectNBinders

[GHC]

#15002: Panic: collectNBinders
-------------------------------------+-------------------------------------
        Reporter:  crockeea          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.2
       Component:  Compiler          |              Version:  8.4.2-rc1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Description changed by crockeea:

Old description:

> Steps to reproduce:
>
> Download concurrent-extra-0.7.0.12 and add the following stack.yaml file:
> resolver: nightly-2018-04-04
> system-ghc: true
> compiler-check: newer-minor
>
> {{{
> > ghc --version
> The Glorious Glasgow Haskell Compilation System, version 8.4.1.20180329
>
> > stack build --library-profiling
> concurrent-extra-0.7.0.12: build (lib)
> Preprocessing library for concurrent-extra-0.7.0.12..
> Building library for concurrent-extra-0.7.0.12..
> [7 of 8] Compiling Control.Concurrent.Broadcast (
> Control/Concurrent/Broadcast.hs, .stack-
> work/dist/x86_64-linux/Cabal-2.2.0.1/build/Control/Concurrent/Broadcast.p_o
> )
> ghc: panic! (the 'impossible' happened)
>   (GHC version 8.4.1.20180329 for x86_64-unknown-linux):
>         collectNBinders
>   1
>   Call stack:
>       CallStack (from HasCallStack):
>         callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in
> ghc:Outputable
>         pprPanic, called at compiler/coreSyn/CoreSyn.hs:2189:39 in
> ghc:CoreSyn
>
> Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
>

> --  While building custom Setup.hs for package concurrent-extra-0.7.0.12
> using:
>       /home/local/ANT/ericcro/.stack/setup-exe-cache/x86_64-linux/Cabal-
> simple_mPHDZzAJ_2.2.0.1_ghc-8.4.1.20180329 --builddir=.stack-
> work/dist/x86_64-linux/Cabal-2.2.0.1 build lib:concurrent-extra --ghc-
> options " -ddump-hi -ddump-to-file -fdiagnostics-color=always"
>     Process exited with code: ExitFailure 1
> }}}

New description:

 Steps to reproduce:

 Download concurrent-extra-0.7.0.12 and add the following stack.yaml file:
 {{{
 resolver: nightly-2018-04-04
 system-ghc: true
 compiler-check: newer-minor
 }}}

 Then run:
 {{{
 > ghc --version
 The Glorious Glasgow Haskell Compilation System, version 8.4.1.20180329

 > stack build --library-profiling
 concurrent-extra-0.7.0.12: build (lib)
 Preprocessing library for concurrent-extra-0.7.0.12..
 Building library for concurrent-extra-0.7.0.12..
 [7 of 8] Compiling Control.Concurrent.Broadcast (
 Control/Concurrent/Broadcast.hs, .stack-
 work/dist/x86_64-linux/Cabal-2.2.0.1/build/Control/Concurrent/Broadcast.p_o
 )
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.4.1.20180329 for x86_64-unknown-linux):
         collectNBinders
   1
   Call stack:
       CallStack (from HasCallStack):
         callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in
 ghc:Outputable
         pprPanic, called at compiler/coreSyn/CoreSyn.hs:2189:39 in
 ghc:CoreSyn

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug


 --  While building custom Setup.hs for package concurrent-extra-0.7.0.12
 using:
       /home/local/ANT/ericcro/.stack/setup-exe-cache/x86_64-linux/Cabal-
 simple_mPHDZzAJ_2.2.0.1_ghc-8.4.1.20180329 --builddir=.stack-
 work/dist/x86_64-linux/Cabal-2.2.0.1 build lib:concurrent-extra --ghc-
 options " -ddump-hi -ddump-to-file -fdiagnostics-color=always"
     Process exited with code: ExitFailure 1
 }}}

--

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15002#comment:1>
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