PUBLIC Hi,
I'm trying to use `mkIfaceTc` to make a ModIface from the results of
typechecking. Everything goes well until it gets to `makeFullIface`, where it
fails to find some imported fingerprints:
hello: hello: panic! (the 'impossible' happened)
(GHC version 9.0.1:
lookupVers1
MyPrim Foo
Call stack:
CallStack (from HasCallStack):
callStackDoc, called at compiler/GHC/Utils/Outputable.hs:1230:37 in
ghc-lib-9.0.1.20210623-3xx7a2u7IkN9vKAnkscROb:GHC.Utils.Outputable
pprPanic, called at compiler/GHC/Iface/Recomp.hs:1455:19 in
ghc-lib-9.0.1.20210623-3xx7a2u7IkN9vKAnkscROb:GHC.Iface.Recomp
I am using the GHC API to load my modules differently than what GHC itself
does; I am attaching the full code, but perhaps to note is that I am creating
ModSummarys one by one and then typechecking and adding them to the
moduleNameProviderMap in dependency order. Also, I am using `downsweep`
directly instead of `depanal`, because the latter's `flushFinderCaches` was
breaking my inter-unit imports.
Because the attached code is a minimized version of something larger, some
parts of it may seem to be doing things in a roundabout way but that's because
in the real program all those degrees of freedom are used. In case that
matters, the only packages in my package DB are rts, ghc-prim-0.7.0 and
ghc-bignum-1.0.
So my question is basically, what am I doing wrong? Why is fingerprinting
failing on `Top.hs`'s import of `MyPrim.hs`, and how do I fix that, while still
keeping this total control over when and how modules are typechecked and loaded?
Thanks,
Gergo
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Top.hs
Description: Top.hs
Main.hs
Description: Main.hs
MyPrim.hs
Description: MyPrim.hs
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