leanprover / leanprover/lean4

Autocomplete not working, vscode falls back to the default.

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bug P-medium
Dominant language
Lean
Stars
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Forks
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Avg merge
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Merged PRs (30d)
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Description

Description

I would have expected lean4 vscode extension to let me autocomplete existing theorem names and imports, but this is not the case - vscode falls back to its default word-level autocomplete. See e.g.:

image
image

Other parts of the extension work, like the error squiggles, syntax highlighting and the right pane.

Versions

vscode-lean: v0.0.118.

 % lean --version
Lean (version 4.2.0-rc4, commit 819b5eaceaa4, Release)
 % uname -a
Linux laplace 6.5.0-4-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.5.10-1 (2023-11-03) x86_64 GNU/Linux

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the issue in VS Code using vscode-lean v0.0.118 and Lean 4.2.0-rc4 on Linux, starting with theorem-name and import completion. Done means the extension provides relevant Lean completions instead of VS Code's default word-level suggestions.

Written by the indexing model from the issue text.

Assessment

Tech stack
vscode
Domain
developer-experience, tooling
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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