Confusion about ghcup-installed hls

[mitchellwrosen]

Hi! I tried installing haskell-language-server-1.8.0.0 via ghcup:

ghcup install hls 1.8.0.0

Now I have this:

haskell-language-server version: 1.8.0.0 (GHC: 9.4.2) (PATH: /home/mitchell/.ghcup/hls/1.8.0.0/lib/haskell-language-server-1.8.0.0/bin/haskell-language-server-wrapper)

...but what's that GHC: 9.4.2? Out of curiosity, I tried changing the GHC on my path to 9.0.2 and running hls. And sure enough, it was busted.

Tool versions found on the $PATH
cabal:          3.8.1.0
stack:          2.7.5
ghc:            9.0.2


Consulting the cradle to get project GHC version...
Project GHC version: 9.0.2
haskell-language-server exe candidates: ["haskell-language-server-9.0.2","haskell-language-server"]
Launching haskell-language-server exe at:/home/mitchell/.ghcup/bin/haskell-language-server-9.0.2
GHC ABIs don't match!

Expected: Cabal-3.4.1.0:bd8a150942e263abdddf4556ba717d44 array-0.5.4.0:6e4d88804dfcdc3d22d4fbacc50bc1d6 base-4.15.1.0:fb0259dfc517fcf0cbf3b39385ccaa15 binary-0.8.8.0:cf20238660376a402396a5d4742a523c bytestring-0.10.12.1:52acb6e3c7139e62dcd0ee5efc262d92 containers-0.6.4.1:4ab0fc030c5cfe45e9e1c4e13244ae50 deepseq-1.4.5.0:4b79675dd6c09afbf9ddae98b204c1c7 directory-1.3.6.2:889ae771f88259f6e9d2b87abb376354 exceptions-0.10.4:50818d159f922b8f71a558855927f976 filepath-1.4.2.1:16a12e277861b40a192400d87b60b411 ghc-9.0.2:fb68bb7a9a06b02609a90ffd8a188a06 ghc-bignum-1.1:4748ab2ad2c09a7b11142e1827d09dd8 ghc-boot-9.0.2:a2d3e78df9bddf082292c2459e23363d ghc-boot-th-9.0.2:3d0f1ef586376a9243dec57892d89111 ghc-compact-0.1.0.0:e5086a2c2f77fd7772508746f65d6936 ghc-heap-9.0.2:3c179a165a9dd5e1fbae0d1f0caa9aba ghc-prim-0.7.0:73976e16cfa5a2a403911029813074eb ghci-9.0.2:2f493b8e7d2e752fbad919136afab3ac haskeline-0.8.2:b1436d710cd2d6d67babca1a8a13b84e hpc-0.6.1.0:2ceabfcda18ab6a6c855ec5f8f158da6 integer-gmp-1.1:eaab7e0252d2a6f7f57f3afab6359f5d libiserv-9.0.2:c5ff0c8c005016d81737b7720b9576c5 mtl-2.2.2:5aed3b46593d26245d63d0d44730bcb6 parsec-3.1.14.0:2a8eeb86f7c06b99558e2daf0779bcea pretty-1.1.3.6:3db6d05f1f02d5c09e348036ceefd23e process-1.6.13.2:64bd8619ed599a2fa9e254c2b89a9b65 rts-1.0.2: stm-2.5.0.0:cff0a4dd2d19d828eb1e1e34d25a5da6 template-haskell-2.17.0.0:fd6ed37874e523bb0bfb3da225da7375 terminfo-0.4.1.5:fc0f06acb01c1aaed286784e5c1172c1 text-1.2.5.0:02ce341e2cba6b5fd9e9868681383053 time-1.9.3:3e763282a8dead59e113f3ec407a60bf transformers-0.5.6.2:6b2415e00ad52111d1ef952610844ea3 unix-2.7.2.2:d326cecdc12930f6a83aeccaa5b7aead xhtml-3000.2.2.1:97ae940ac14864fca6f3dbd08dc3f6ed
Got:      Cabal-3.4.1.0:ab74f2c3161b496273c112bc304128c5 array-0.5.4.0:60b03bb14f2fb672c7d45b226c353ec1 base-4.15.1.0:b7bb9d150077ce1eefa2cb650417b227 binary-0.8.8.0:fa88338820a9bd0b504bf213a8e72719 bytestring-0.10.12.1:28912719bcbb836263ecf818c4004d98 containers-0.6.4.1:bf00c7599db8af6c073a044b172248dc deepseq-1.4.5.0:0cf68babae66ababbe71ea47b01804fa directory-1.3.6.2:b82e95002902f0bdb50c05dc51b225ca exceptions-0.10.4:a3c9fa639722ef9d50341c6cd2385d93 filepath-1.4.2.1:f9de4a7f0f552804d24b9223eb693d53 ghc-9.0.2:0cab42b9f0b20868d0736b02935b8866 ghc-bignum-1.1:15967d121cc201c802258aaa5c934bcb ghc-boot-9.0.2:039cdff4f5fc2e0f39b30a6c78d62d65 ghc-boot-th-9.0.2:1fac6b56dc58f2dcc9db351a93d9ba82 ghc-compact-0.1.0.0:d89810b7bdcf2139de5c6556a1ac4a7f ghc-heap-9.0.2:15ea845dceccc5a82c8f166b98b06abb ghc-prim-0.7.0:73976e16cfa5a2a403911029813074eb ghci-9.0.2:44e4f88c631e291af61ce91b76fbea09 haskeline-0.8.2:5361530f9aec03de9188d994aa62c524 hpc-0.6.1.0:b68473d0ac443f4d1d885c4e320214e9 integer-gmp-1.1:6e51ea8b50a9fe5db3b235fec13d166d libiserv-9.0.2:298c71b0c3b7568c92e50683303fba08 mtl-2.2.2:281e19dd29c936cd4c9d8e152d50033f parsec-3.1.14.0:1ba7fb990e3bfe3823a06a9994c407da pretty-1.1.3.6:0afd3b4e13803cee680552ac40e3619e process-1.6.13.2:d13b828d4126001ef8415f7d2bba1fae rts-1.0.2: stm-2.5.0.0:2abafd3d3074be9dbfcd04c00dc359a8 template-haskell-2.17.0.0:0f82000709e76bc945a8f1d61f8c081d terminfo-0.4.1.5:78bfad4e1a38582ba34d5d263d1d1f75 text-1.2.5.0:cf399f9a19fcee928a7fc309096a7c48 time-1.9.3:62b52209105ec2b6827bf78dfbd8cb45 transformers-0.5.6.2:2a63be5f37cb981a011ed62743dba8c8 unix-2.7.2.2:db9a0e7818cd41e42f6ec7fe4546e402 xhtml-3000.2.2.1:6106604d25403bc5424f906bf9952fe2
Content-Length: 203

{"jsonrpc":"2.0", "method":"window/showMessage", "params": {"type": 1, "message": "Couldn't find a working/matching GHC installation. Consider installing ghc-9.0.2 via ghcup or build HLS from source."}}%

So, my question is: are these ghcup-installed hls executables only usable by one version of the compiler? Am I able to install a version of haskell-language-server-1.8.0.0 that works with GHC 9.0.2 (for example), or no?

Thanks for your help!

[hasufell]

but what's that GHC: 9.4.2

No, that's just the GHC version the HLS wrapper was built with. It doesn't matter.

So, my question is: are these ghcup-installed hls executables only usable by one version of the compiler? Am I able to install a version of haskell-language-server-1.8.0.0 that works with GHC 9.0.2 (for example), or no?

This should work. What's your distro and distro version?

[mitchellwrosen]

Thanks. I'm on Pop!_OS:

Linux pop-os 6.0.6-76060006-generic #202210290932~1667401208~22.04~d2df702 SMP PREEMPT_DYNAMIC Wed N x86_64 x86_64 x86_64 GNU/Linux

I just noticed this issue may be a duplicate of #3225

[michaelpj]

No movement on this for a while, tentatively closing as stale unless it's still happening.