Extension issue in set up: `TypeError: Cannot read property 'slice' of null`

[maguldemond]

• Issue Type: Bug
• Extension Name: haskell
• Extension Version: 1.6.0
• OS Version: Darwin x64 19.6.0
• VS Code version: 1.59.0

I'm trying to run the Haskell extension on VS Code on MacOS. I have tried restarting VS Code, but when I try to right click to get a definition, it starts "Processing". And it hangs there like that for hours. (see screen shot)

I'm trying to work on IOHK Plutus code. When setting up the Plutus repos on a linux Docker container, it took several hours to build.

I also noticed in the VS Code list of running extensions, that the Haskell extension has 1 uncaught error. (see screenshot) The Extension Host Log has this error in it:

[2021-08-11 14:49:08.226] [exthost] [error] TypeError: Cannot read property 'slice' of null
at InteroLocationDecoder.extractRange (/Users/marcelg/.vscode/extensions/ucl.haskelly-0.5.5/out/src/Providers/InteroLocationDecoder.js:24:13)
at InteroLocationDecoder.buildLocation (/Users/marcelg/.vscode/extensions/ucl.haskelly-0.5.5/out/src/Providers/InteroLocationDecoder.js:11:28)
at InteroLocationDecoder.decode (/Users/marcelg/.vscode/extensions/ucl.haskelly-0.5.5/out/src/Providers/InteroLocationDecoder.js:6:21)
at HaskellDefinitionProvider. (/Users/marcelg/.vscode/extensions/ucl.haskelly-0.5.5/out/src/Providers/Definition/index.js:24:47)
at Generator.next ()
at fulfilled (/Users/marcelg/.vscode/extensions/ucl.haskelly-0.5.5/out/src/Providers/Definition/index.js:4:58)
at runMicrotasks ()
at processTicksAndRejections (internal/process/task_queues.js:93:5)

[jneira]

Hi, thanks for the detailed bug report, i've observed that the error mentions haskelly, which is another haskell extension: https://marketplace.visualstudio.com/items?itemName=UCL.haskelly
Maybe it is colliding with this haskell extension? Could you uninstall it to check it?

[jneira]

@maguldemond did you have the chance to check it?

[jneira]

Closing optimistically, assuming to have haskelly installed and activated is related, feel free to reopen if that is not the case