Package build failures resolver ghc-9.0.1

[shayne-fletcher]

General summary

Building ghc-lib-parser with resolver ghc-9.0.1 fails (the package is known to build with cabal / ghc-9.0).

Steps to reproduce

#!/usr/bin/env bash

set -euo pipefail

# This version of ghc-lib-parser is known to build with cabal/ghc-9.0.
ghc_lib_parser=ghc-lib-parser-9.0.1.20210207
curl -o ${ghc_lib_parser}.tar.gz https://hackage.haskell.org/package/${ghc_lib_parser}/${ghc_lib_parser}.tar.gz
gunzip ${ghc_lib_parser}.tar.gz && tar xvf ${ghc_lib_parser}.tar
cd ${ghc_lib_parser}

# Select ghc-9.0.1 for the build compiler.
cat > stack.yaml <<EOF
resolver: ghc-9.0.1
packages:
- .
extra-deps:
- alex-3.2.6
- happy-1.20.0
EOF

# Try to build; observe errors.
stack build --verbosity=debug

Expected

The build succeeds.

Actual

After successfully compiling all the modules in the package an exception is raised.

....
2021-02-07 01:31:58.020433: [info] [264 of 264] Compiling GHC.Driver.Hooks
2021-02-07 01:32:02.694253: [debug] Process finished in 377998ms: /Users/shayne/.stack/setup-exe-cache/x86_64-osx/Cabal-simple_mPHDZzAJ_3.4.0.0_ghc-9.0.1 --builddir=.stack-work/dist/x86_64-osx/Cabal-3.4.0.0 build lib:ghc-lib-parser --ghc-options " -fdiagnostics-color=always"
2021-02-07 01:32:02.694375: [debug] Start: getPackageFiles /Users/shayne/tmp/tt/ghc-lib-parser-9.0.1.20210207/ghc-lib-parser.cabal
2021-02-07 01:32:03.373370: [debug] Failed to decode module interface:
/Users/shayne/tmp/tt/ghc-lib-parser-9.0.1.20210207/.stack-work/dist/x86_64-osx/Cabal-3.4.0.0/build/GHC/BaseDir.hi
Decoding failure: not enough bytes
...
2021-02-07 01:32:03.380782: [debug] Finished with exception in 686ms: getPackageFiles /Users/shayne/tmp/tt/ghc-lib-parser-9.0.1.20210207/ghc-lib-parser.cabal
Exception thrown: Prelude.chr: bad argument: 251658397
2021-02-07 01:32:03.381224: [error] Prelude.chr: bad argument: 251658397

Stack version

$ stack --version
Version 2.5.1, Git revision d6ab861544918185236cf826cb2028abb266d6d5 x86_64 hpack-0.33.0

Method of installation

• Official binary, downloaded from stackage.org or fpcomplete's package repository

[qrilka]

@shayne-fletcher I think this is another occurrence of #5134 which is unfortunately not yet resolved.

[shayne-fletcher]

Any updates? This is quite the blocker for ghc-lib/ghc-9.0 😔

[asr]

We are getting a similar error in Agda (see agda/agda#4955 (comment)):

Agda> configure (lib + exe + test)
Configuring Agda-2.6.2...
Progress 1/2
Prelude.chr: bad argument: 2382365296

Blocking agda/agda#4955.

[snoyberg]

Please see #5508