panic when building ghc head

Carter Schonwald carter.schonwald at
Sat Oct 18 22:49:37 UTC 2014

nevermind, pardon the noise

On Sat, Oct 18, 2014 at 4:52 PM, Carter Schonwald <
carter.schonwald at> wrote:

> hey all,
> when doing a devel1 build  i got the following panic
> "inplace/bin/genapply" >rts/dist/build/AutoApply.cmm"inplace/bin/ghc-stage1" -static  -H64m -O -fasm -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -this-package-key rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build -irts/dist/build/autogen -Irts/dist/build -Irts/dist/build/autogen           -O2    -c rts/dist/build/AutoApply.cmm -o rts/dist/build/AutoApply.o"inplace/bin/ghc-stage1" -fPIC -dynamic  -H64m -O -fasm -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -this-package-key rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build -irts/dist/build/autogen -Irts/dist/build -Irts/dist/build/autogen           -O2    -c rts/dist/build/AutoApply.cmm -o rts/dist/build/AutoApply.dyn_o"inplace/bin/ghc-stage1" -static -eventlog  -H64m -O -fasm -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -this-package-key rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build -irts/dist/build/autogen -Irts/dist/build -Irts/dist/build/autogen           -O2    -c rts/dist/build/AutoApply.cmm -o rts/dist/build/AutoApply.l_o"inplace/bin/ghc-stage1" -static -optc-DDEBUG -ticky -DTICKY_TICKY  -H64m -O -fasm -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -this-package-key rts -dcmm-lint  -DDTRACE     -i -irts -irts/dist/build -irts/dist/build/autogen -Irts/dist/build -Irts/dist/build/autogen           -O2 -O0    -c rts/dist/build/AutoApply.cmm -o rts/dist/build/AutoApply.debug_o*** Core Lint warnings : in result of Desugar (after optimization) ***{-# LINE 101 "libraries/ghc-prim/GHC/Classes.hs #-}: Warning:
>     [RHS of $c/=_a1qs :: GHC.Types.Float
>                          -> GHC.Types.Float -> GHC.Types.Bool]
>     INLINE binder is (non-rule) loop breaker: $c/=_a1qs{-# LINE 104 "libraries/ghc-prim/GHC/Classes.hs #-}: Warning:
>     [RHS of $c/=_a1ql :: GHC.Types.Double
>                          -> GHC.Types.Double -> GHC.Types.Bool]
>     INLINE binder is (non-rule) loop breaker: $c/=_a1ql{-# LINE 85 "libraries/ghc-prim/GHC/Classes.hs #-}: Warning:
>     [RHS of $c/=_a1qZ :: forall a_a1X.
>                          GHC.Classes.Eq a_a1X =>
>                          [a_a1X] -> [a_a1X] -> GHC.Types.Bool]
>     INLINE binder is (non-rule) loop breaker: $c/=_a1qZ
> ghc-stage1: panic! (the 'impossible' happened)
>   (GHC version 7.9.20141018 for x86_64-apple-darwin):
> 	tyConAppTyCon a_12
> Please report this as a GHC bug:
> any ideas of how I could debug this? Or what it might be?
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