HLS 1.5 requires `hie.yaml` else it would fail to run, but works in HLS 1.2

[sekunho]

Hello, thanks again for all the work put into HLS!

Your environment

Output of haskell-language-server --probe-tools or haskell-language-server-wrapper --probe-tools:

haskell-language-server version: 1.5.0.0 (GHC: 8.10.7) (PATH: /nix/store/ngi32ilj18ppcc78g0kc3z3zq4r3s049-haskell-language-server-1.5.0.0/bin/haskell-language-server)
Tool versions found on the $PATH
cabal:		3.6.2.0
stack:		Not found
ghc:		8.10.7

Which OS do you use:
NixOS 21.05

Which lsp-client do you use:
doom emacs v21.12.0-alpha with haskell mode

Describe your project (alternative: link to the project):
It's a newly generated project with cabal init --interactive with nix flakes to provide the HLS, cabal, and GHC. https://gist.github.com/sekunho/72747c20a192e62a6fc9dc9e9660aa0a

Contents of hie.yaml:
N/A

Steps to reproduce

1. nix develop (or direnv)
2. haskell-language-server --debug
3. Fails to start cause of error

However, it works if I do:

1. gen-hie > hie.yaml
2. haskell-language-server

It's strange because when I pin a commit of nixpkgs to one that contains HLS 1.2.0.0 and ghc 8.10.6, it works. It doesn't work with HLS 1.5.0.0 and GHC 8.10.7. How come 1.5 requires hie.yaml while 1.2 doesn't?

Expected behaviour

Shouldn't complain about a bad file descriptor without hie.yaml since it works for 1.2.

Actual behaviour

Complains about a bad file descriptor without it.

Include debug information

Execute in the root of your project the command haskell-language-server --debug . and paste the logs here:

Debug output:

# haskell-language-server --debug

[sekun@nixos:~/Projects/foo]$ haskell-language-server --debug
haskell-language-server version: 1.5.0.0 (GHC: 8.10.7) (PATH: /nix/store/ngi32ilj18ppcc78g0kc3z3zq4r3s049-haskell-language-server-1.5.0.0/bin/haskell-language-server)
 ghcide setup tester in /home/sekun/Projects/foo.
Report bugs at https://github.com/haskell/haskell-language-server/issues

Step 1/4: Finding files to test in /home/sekun/Projects/foo
Found 2 files

Step 2/4: Looking for hie.yaml files that control setup
Found 1 cradle
  ()

Step 3/4: Initializing the IDE
2021-11-25 14:39:32.955603396 [ThreadId 7] DEBUG hls:	Initializing exports map from hiedb

Step 4/4: Type checking 2021-11-25 14:39:32.956138658 [ThreadId 7] DEBUG hls:	Done initializing exports map from hiedb (0)
the files
2021-11-25 14:39:32.956815549 [ThreadId 31] INFO hls:	Consulting the cradle for "src/Foo.hs"
2021-11-25 14:39:32.956900639 [ThreadId 31] WARNING hls:	No [cradle](https://github.com/mpickering/hie-bios#hie-bios) found for src/Foo.hs.
 Proceeding with [implicit cradle](https://hackage.haskell.org/package/implicit-hie).
You should ignore this message, unless you see a 'Multi Cradle: No prefixes matched' error.
2021-11-25 14:39:32.970625984 [ThreadId 31] DEBUG hls:	Output from setting up the cradle Cradle {cradleRootDir = "", cradleOptsProg = CradleAction: Cabal}
2021-11-25 14:39:32.972146247 [ThreadId 27] INFO hls:	File:     /home/sekun/Projects/foo/src/Foo.hs
Hidden:   no
Range:    1:1-2:1
Source:   compiler
Severity: DsError
Message:  cabal: streamingProcess: chdir: invalid argument (Bad file descriptor)
2021-11-25 14:39:32.972431128 [ThreadId 30] INFO hls:	File:     /home/sekun/Projects/foo/test/MyLibTest.hs
Hidden:   no
Range:    1:1-2:1
Source:   compiler
Severity: DsError
Message:  cabal: streamingProcess: chdir: invalid argument (Bad file descriptor)
2021-11-25 14:39:32.972707809 [ThreadId 19] INFO hls:	finish: User TypeCheck (took 0.02s)
2021-11-25 14:39:32.972927379 [ThreadId 42] INFO hls:	finish: GetHie (took 0.00s)
F2021-11-25 14:39:32.97316226 [ThreadId 49] INFO hls:	finish: GenerateCore (took 0.00s)
iles that failed:
 * /home/sekun/Projects/foo/src/Foo.hs
 * /home/sekun/Projects/foo/test/MyLibTest.hs

Completed (0 files worked, 2 files failed)

Paste the logs from the lsp-client, e.g. for VS Code

LSP logs:

# lsp-log buffer
Command "haskell-language-server --lsp -d -l /tmp/hls.log" is present on the path.
Command "haskell-language-server --lsp -d -l /tmp/hls.log" is present on the path.
Command "haskell-language-server --lsp -d -l /tmp/hls.log" is present on the path.
Found the following clients for /home/sekun/Projects/foo/src/Foo.hs: (server-id lsp-haskell, priority 0)
The following clients were selected based on priority: (server-id lsp-haskell, priority 0)
Creating watchers for following 3 folders:
  /home/sekun/Projects/foo
  /home/sekun/Projects/foo/src
  /home/sekun/Projects/foo/test

# lsp-haskell::stderr
haskell-language-server version: 1.5.0.0 (GHC: 8.10.7) (PATH: /nix/store/ngi32ilj18ppcc78g0kc3z3zq4r3s049-haskell-language-server-1.5.0.0/bin/haskell-language-server)
Starting (haskell-language-server)LSP server...
  with arguments: GhcideArguments {argsCommand = LSP, argsCwd = Nothing, argsShakeProfiling = Nothing, argsTesting = False, argsExamplePlugin = False, argsDebugOn = True, argsLogFile = Just "/tmp/hls.log", argsThreads = 0, argsProjectGhcVersion = False}
  with plugins: [PluginId "pragmas",PluginId "floskell",PluginId "fourmolu",PluginId "tactics",PluginId "ormolu",PluginId "stylish-haskell",PluginId "retrie",PluginId "brittany",PluginId "callHierarchy",PluginId "class",PluginId "haddockComments",PluginId "eval",PluginId "importLens",PluginId "refineImports",PluginId "moduleName",PluginId "hlint",PluginId "splice",PluginId "ghcide-hover-and-symbols",PluginId "ghcide-code-actions-imports-exports",PluginId "ghcide-code-actions-type-signatures",PluginId "ghcide-code-actions-bindings",PluginId "ghcide-code-actions-fill-holes",PluginId "ghcide-completions",PluginId "ghcide-type-lenses",PluginId "ghcide-core"]
  in directory: /home/sekun/Projects/foo
 Couldn't load cradle for libdir: (CradleError {cradleErrorDependencies = [], cradleErrorExitCode = ExitSuccess, cradleErrorStderr = ["Couldn't execute cabal --builddir=/home/sekun/.cache/hie-bios/dist-foo-7de3951b2299bde2ff8672638cbcd53f v2-exec --with-compiler /home/sekun/.cache/hie-bios/wrapper-13a09b18ea883dd377d59db5e821a86b ghc -v0 -- --print-libdir"]},"/home/sekun/Projects/foo",Nothing,Cradle {cradleRootDir = "", cradleOptsProg = CradleAction: Cabal})

[jneira]

thanks for reporting the issue
have those directories something special: filesystem, perms, hard links?

How come 1.5 requires hie.yaml while 1.2 doesn't?

hie.yaml should not be necessary so it is a bug probably related with the hie-bios library

//cc @fendor

[sekunho]

have those directories something special: filesystem, perms, hard links?

How do I check for this?

[jneira]

hmm ls -la and df . in ~/Projects/foo? i am not a linux expert though

[sekunho]

Ah got it.

[sekun@nixos:~/Projects/foo]$ ls -la
total 76
drwxr-xr-x 7 sekun users  4096 Nov 25 15:12 .
drwxr-xr-x 7 sekun users  4096 Nov 25 11:39 ..
-rw-r--r-- 1 sekun users   115 Nov 25 11:58 CHANGELOG.md
drwxr-xr-x 3 sekun users  4096 Nov 25 15:12 .direnv
drwxr-xr-x 6 sekun users  4096 Nov 25 12:01 dist-newstyle
-rw-r--r-- 1 sekun users    10 Nov 25 15:12 .envrc
-rw-r--r-- 1 sekun users   992 Nov 25 15:01 flake.lock
-rw-r--r-- 1 sekun users   696 Nov 25 15:11 flake.nix
drwxr-xr-x 8 sekun users  4096 Nov 25 15:11 .git
-rw-r--r-- 1 sekun users   293 Nov 25 11:48 .gitignore
-rw-r--r-- 1 sekun users   146 Nov 25 15:12 hie.yaml
-rw-r--r-- 1 sekun users  1514 Nov 25 11:26 LICENSE
drwxr-xr-x 2 sekun users  4096 Nov 25 14:29 src
-rw-r--r-- 1 sekun users 13903 Nov 25 14:19 .stylish-haskell.yaml
-rw-r--r-- 1 sekun users  1124 Nov 25 14:48 foo.cabal
drwxr-xr-x 2 sekun users  4096 Nov 25 11:58 test

[sekun@nixos:~/Projects/foo]$ df .
Filesystem                                             1K-blocks     Used Available Use% Mounted on
/dev/disk/by-uuid/c950348d-10f4-421f-a595-486f064fc3f1 471571688 35942640 411601096   9% /

[pepeiborra]

Could you test with 1.4, to find out in which version things regressed?

[fendor]

How did you install HLS?

This error looks suspiciously like a bug from implicit-hie-cradle, but no HLS version that uses the buggy version has been published yet.

I just checked that nixpkgs nightly contains the offending version (0.4.0.1). So maybe HLS has been built by nix with implicit-hie-cradle-0.4.0.1?

[sekunho]

@pepeiborra Sure, hopefully I'll be able look into it tomorrow if ever needed.

@fendor

How did you install HLS?

Through nix

I just checked that nixpkgs nightly contains the offending version (0.4.0.1). So maybe HLS has been built by nix with implicit-hie-cradle-0.4.0.1?

Ah I think that's it! I just checked it for the specific commit if nixpkgs I'm using; matches the version you mentioned. Is this resolved in 0.4.0.2?

[fendor]

I hope so, but I don't think implicit-hie has any tests. The relevant PR is: #2342
And it affects you if your cabal version is >= 3.4

[kczulko]

Hi,

I've just checked it (I think so...). In my case haskell-language-server-wrapper still fails with implicit-hie-cradle 0.4.0.2. I'm using hls from unstable nixpkgs (1.5.0.0 currently) and I had to turn off testing for hls-tactics-plugin (some ormolu(?) test was failing).

Here is my nix overlay: kczulko/nixos-config@24e4180

And this is what I get:

HLS output (part of it)

Message:  cabal: streamingProcess: chdir: invalid argument (Bad file descriptor)
2021-11-27 01:40:54.183502841 [ThreadId 89] INFO hls:	File:     /home/kczulko/Projects/programming-in-haskell/chapters/Excs1.hs
Hidden:   no
Range:    1:1-2:1
Source:   compiler
Severity: DsError
Message:  cabal: streamingProcess: chdir: invalid argument (Bad file descriptor)
2021-11-27 01:40:54.184112027 [ThreadId 88] INFO hls:	File:     /home/kczulko/Projects/programming-in-haskell/chapters/Excs2.hs
Hidden:   no
Range:    1:1-2:1
Source:   compiler
Severity: DsError
Message:  cabal: streamingProcess: chdir: invalid argument (Bad file descriptor)
2021-11-27 01:40:54.184619315 [ThreadId 90] INFO hls:	File:     /home/kczulko/Projects/programming-in-haskell/app/Main.hs
Hidden:   no
Range:    1:1-2:1
Source:   compiler
Severity: DsError

Thanks,
Karol

[iankohdes]

Like @sekunho I have the same issue. Here are some further details:

• macOS 12.0.1 Monterey (with zsh as the shell)
• VS Code 1.62 (with Haskell extension 1.7.1)
• GHC 8.10.7 (installed using ghcup)
• Cabal 3.6.2.0 (installed using ghcup)
• HLS 1.5.0 (installed using ghcup)

I am not using Nix. I’m new to all this therefore I don’t really know how to debug this (also I can’t run the haskell-language-server command like @sekunho did, because zsh tells me the command wasn’t found).

This doesn’t impose too much of an inconvenience so I think I’ll make use of the compiler directly for now. Hopefully this gets sorted out soon! And yes, thank you all for your work on the HLS!

[Avi-D-coder]

I have published implicit-hie-cradle-0.5.0.0, which reverts all 0.4's changes.
It should get picked up by nix at some point and this problem will be fixed.