generic-stack-builder crashes with infinite recursion

[arianvp]

Issue description

I tried the generic stack builder haskell.lib.buildStackProject but it crashes

Steps to reproduce

❯stack new haskell-test
❯echo << EOF
{ pkgs ? (import <nixpkgs> {})}:
with pkgs;
haskell.lib.buildStackProject {
  name = "haskell-test";
  buildInputs = [];
} EOF > default.nix

❯ nix-build           
error: infinite recursion encountered, at /nix/store/39mxghirb766z1969z185a7c889vzbyv-nixpkgs-17.09pre108299.ec9a23332f/nixpkgs/pkgs/development/haskell-modules/generic-stack-builder.nix:8:9
(use ‘--show-trace’ to show detailed location information)

Technical details

• System:

    LSB Version:	1.4
    Distributor ID:	Arch
    Description:	Arch Linux
    Release:	rolling
    Codename:	n/a
  

• Nix version: (run nix-env --version)

  nix-env (Nix) 1.11.9
  

• Nixpkgs version: (run nix-instantiate --eval '<nixpkgs>' -A lib.nixpkgsVersion)

  "17.09pre108299.ec9a23332f"
  

• Sandboxing enabled: (run grep build-use-sandbox /etc/nix/nix.conf)
  nope

[ElvishJerricco]

You have to provide a ghc argument. This line is supposed to make this unnecessary by providing a default ghc, but it's broken because ghc ? ghc ends up just referencing itself rather than the ghc binding from above (hence the infinite recursion).

[arianvp]

Oh thanks!

…

On Tue, 13 Jun 2017, 21:47 Will Fancher, ***@***.***> wrote: You have to provide a ghc argument. This line <https://github.com/NixOS/nixpkgs/blob/139b1377d4f9a8c943af79dd245ea9ecf6536567/pkgs/development/haskell-modules/generic-stack-builder.nix#L8> is supposed to make this unnecessary by providing a default ghc, but it's broken because ghc ? ghc ends up just referencing itself rather than the ghc binding from above (hence the infinite recursion). — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#26441 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAmWo9-UiVVxHZ8UrLJfk84VYvLf9Ag3ks5sDudRgaJpZM4NyXFO> .