Help with build ordering issue

Ben Gamari ben at
Sun Feb 25 20:30:41 UTC 2018

Sylvain Henry <sylvain at> writes:

> On 20/02/2018 03:25, Ben Gamari wrote:
>> Sylvain Henry <sylvain at> writes:
>>> Hi,
>>> @Bodigrim is working on a patch (
>>> to fix #14170.
>>> The build fails because of interface file errors: "bad interface file"
>>> for GHC.Natural and "failed to load interface" for GHC.Types.
>>> I suspect it is a wired-in module build ordering issue but I haven't
>>> been able to help fixing it. If anyone with more insights could help it
>>> would be much appreciated!
>> Can you paste the full error? What module is failing to compile? Which
>> definition is it loading the interface for?
>> Cheers,
>> - Ben
> "inplace/bin/ghc-stage1" -hisuf hi -osuf  o -hcsuf hc -static  -O0 -H64m -Wall      -this-unit-id base- -hide-all-packages -i -ilibraries/base/. -ilibraries/base/dist-install/build -Ilibraries/base/dist-install/build -ilibraries/base/dist-install/build/./autogen -Ilibraries/base/dist-install/build/./autogen -Ilibraries/base/include   -optP-DOPTIMISE_INTEGER_GCD_LCM -optP-include -optPlibraries/base/dist-install/build/./autogen/cabal_macros.h -package-id rts -package-id ghc-prim- -package-id integer-gmp- -this-unit-id base -XHaskell2010 -O  -no-user-package-db -rtsopts  -Wno-trustworthy-safe -Wno-deprecated-flags     -Wnoncanonical-monad-instances  -odir libraries/base/dist-install/build -hidir libraries/base/dist-install/build -stubdir libraries/base/dist-install/build   -dynamic-too -c libraries/base/./GHC/Natural.hs -o libraries/base/dist-install/build/GHC/Natural.o -dyno libraries/base/dist-install/build/GHC/Natural.dyn_o
> <interactive>:1:1: error:
>      Bad interface file: libraries/base/dist-install/build/GHC/Natural.hi
>          libraries/base/dist-install/build/GHC/Natural.hi: openBinaryFile: does not exist (No such file or directory)
Hmm, I'm afraid that's not particularly illuminating.

It would be helpful to see the output from -ddump-if-trace as this will
tell you why GHC is trying to load this interface file.


- Ben
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