type-defaults warning occurs before first commit

[wataru86]

I tried using optparse-simple of github version in my repository.
I added OverloadedStrings pragma to Sample.hs.

{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE OverloadedStrings #-}
module Main (main) where

import           Options.Applicative.Simple (simpleVersion)
import qualified Paths_SampleA as Meta

main :: IO ()
main = putStrLn $(simpleVersion Meta.version)

type-defaults warning occured in these cases.

• When there is no .git directory.
• When I did git init, but did not git commit.

$ stack build
optparse-simple-0.1.1: configure (lib)
optparse-simple-0.1.1: build (lib)
optparse-simple-0.1.1: copy/register
Building all executables for `SampleA' once. After a successful build of all of them, only specified executables will be rebuilt.
SampleA-0.1.0.0: configure (exe)
Configuring SampleA-0.1.0.0...
SampleA-0.1.0.0: build (exe) 
Preprocessing executable 'SampleA-exe' for SampleA-0.1.0.0..
Building executable 'SampleA-exe' for SampleA-0.1.0.0..
[1 of 2] Compiling Paths_SampleA    ( .stack-work/dist/x86_64-linux/Cabal-2.4.0.1/build/SampleA-exe/autogen/Paths_SampleA.hs, .stack-work/dist/x86_64-linux/Cabal-2.4.0.1/build/SampleA-exe/SampleA-exe-tmp/Paths_SampleA.o )
[2 of 2] Compiling Main             ( app/Main.hs, .stack-work/dist/x86_64-linux/Cabal-2.4.0.1/build/SampleA-exe/SampleA-exe-tmp/Main.o )
                             
/home/yamada/test/190106/test/SampleA/app/Main.hs:9:19: warning: [-Wtype-defaults]
    • Defaulting the following constraint to type ‘[Char]’
        Data.String.IsString a0
          arising from the literal ‘"GHEGitRunFailed "." ["rev-parse","--show-toplevel"] (ExitFailure 128) "" "fatal: Not a git repository (or any of the parent directories): .git\n""’
    • In the first argument of ‘Left’, namely
        ‘"GHEGitRunFailed "." ["rev-parse","--show-toplevel"] (ExitFailure 128) "" "fatal: Not a git repository (or any of the parent directories): .git\n""’
      In the expression:     
        Left                 
          "GHEGitRunFailed "." ["rev-parse","--show-toplevel"] (ExitFailure 128) "" "fatal: Not a git repository (or any of the parent directories): .git\n""
      In the second argument of ‘(++)’, namely
        ‘(case               
              Left           
                "GHEGitRunFailed "." ["rev-parse","--show-toplevel"] (ExitFailure 128) "" "fatal: Not a git repository (or any of the parent directories): .git\n""
          of                 
            Left _ -> []     
            Right gi_a6X0    
              -> [", Git revision ", githash-0.1.3.0:GitHash.giHash gi_a6X0,
                  if githash-0.1.3.0:GitHash.giDirty gi_a6X0 then
                      " (dirty)"
                  else       
                      ""])’  
  |                          
9 | main = putStrLn $(simpleVersion Meta.version)
  |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^
Linking .stack-work/dist/x86_64-linux/Cabal-2.4.0.1/build/SampleA-exe/SampleA-exe ...
                             
SampleA-0.1.0.0: copy/register
Installing executable SampleA-exe in /home/yamada/test/190106/test/SampleA/.stack-work/install/x86_64-linux/lts-13.1/8.6.3/bin
Completed 2 action(s).   

After git commit, I didn't get the warning.

$ git add .
$ git commit -m "Add files"
[master (root-commit) 543addf] Add files
 5 files changed, 38 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 app/Main.hs
 create mode 100644 package.yaml
 create mode 100644 stack.yaml
$ stack clean --full
$ stack build
optparse-simple-0.1.1: configure (lib)
optparse-simple-0.1.1: build (lib) 
optparse-simple-0.1.1: copy/register
Building all executables for `SampleA' once. After a successful build of all of them, only specified executables will be rebuilt.
SampleA-0.1.0.0: configure (exe)   
Configuring SampleA-0.1.0.0...     
SampleA-0.1.0.0: build (exe) 
Preprocessing executable 'SampleA-exe' for SampleA-0.1.0.0..
Building executable 'SampleA-exe' for SampleA-0.1.0.0..
[1 of 2] Compiling Paths_SampleA    ( .stack-work/dist/x86_64-linux/Cabal-2.4.0.1/build/SampleA-exe/autogen/Paths_SampleA.hs, .stack-work/dist/x86_64-linux/Cabal-2.4.0.1/build/SampleA-exe/SampleA-exe-tmp/Paths_SampleA.o )
[2 of 2] Compiling Main             ( app/Main.hs, .stack-work/dist/x86_64-linux/Cabal-2.4.0.1/build/SampleA-exe/SampleA-exe-tmp/Main.o )
Linking .stack-work/dist/x86_64-linux/Cabal-2.4.0.1/build/SampleA-exe/SampleA-exe ...
SampleA-0.1.0.0: copy/register
Installing executable SampleA-exe in /home/yamada/test/190106/test/SampleA/.stack-work/install/x86_64-linux/lts-13.1/8.6.3/bin
Completed 2 action(s).   

stack version is 1.9.3.

[borsboom]

I'm experiencing this same error even on a project with lots of commits (stack itself, after upgrading to the latest Stackage nightly and getting optparse-simple-0.1.1).

[snoyberg]

Can you ensure you're using githash-0.1.3.1?

[borsboom]

I can confirm that I am.

[snoyberg]

I'm getting thoroughly stumped. Unpacking the source code for optparse-simple and referring to a local directory works around the problem. Investigating a bit further...

[snoyberg]

Alright, can you try using 0.1.1.1 from Hackage? I think that should work around it. I still have no idea why it worked locally and not from a tarball, or why typed Template Haskell didn't seem to solve this problem.

[borsboom]

optparse-simple-0.1.1.1 works for me.

[snoyberg]

Thanks for confirming