Bug in ghcmod#basedir() when using a stack project and stack is complaining to stderr

[ilyagr]

ghcmod-vim does not work with my stack project. I think the issue is related to the fact that stack path --project-root prints Continuing despite missing tool: msys2 to stderr before printing the path to stdout. The function ghcmod#basedir() returns both lines instead of just the path.

[jimenezrick]

That stderr is coming from stack or ghc-mod itself? Because if it's coming from ghc-mod it should be fixed now.

Not sure if this vim plugin or ghc-mod actually calls stack though.