Error when using RTS options with the Stack script interpreter

[danclien]

General

Using Stack as a script interpreter doesn't accept RTS options as noted in the Stack documentation.

I'm not sure if there's a bug with Stack or an error in the documentation.

Steps to reproduce

1. Put the following in a file:
   • The top section is copied and pasted from the Stack documentation.

   #!/usr/bin/env stack
   {- stack
     script
     --resolver lts-6.25
     --package turtle
     --
     +RTS -s -RTS
   -}
   
   main :: IO
   main = putStrLn "Hello, world!"
   

2. Make the file executable

   $ chmod +x <file>
   

3. Execute the file

   $ ./<file>
   

Expected

The script should print Hello, world!.

Actual

The script errors out with the following:

target ‘+RTS’ is not a module name or a source file

Output

$ stack --version
Version 1.6.1, Git revision f25811329bbc40b0c21053a8160c56f923e1201b (5435 commits) x86_64 hpack-0.20.0
$ cat ./StackScriptTest.hs
#!/usr/bin/env stack
{- stack
  script
  --resolver lts-6.25
  --package turtle
  --
  +RTS -s -RTS
-}

main :: IO
main = putStrLn "Hello, world!"
$ ./StackScriptTest.hs
target ‘/home/dacali/projects/onefile/+RTS’ is not a module name or a source file

Stack version

$ stack --version
Version 1.6.1, Git revision f25811329bbc40b0c21053a8160c56f923e1201b (5435 commits) x86_64 hpack-0.20.0

Method of installation

• Upgraded with stack upgrade

[mgsloan]

Hi! Thanks for the report. I've opened a PR, #3668 which resolves this issue.

[danclien]

@mgsloan, thanks for the quick response!

[decentral1se]

Done in #3668. Thanks for the report @danclien.