leanprover / leanprover/vscode-lean4

Goals in traces are not properly indented

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TypeScript
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Description

When displaying a goal as as part of a trace message, the goal is always fully dedented, even if it is within an indented trace node. This is mildly annoying since it breaks the hierarchical structure of the trace messages. Emacs does not have this issue.

MWE:

import Lean

open Lean Lean.Elab.Tactic

elab "test" : tactic => do
  withTraceNode `debug (λ _ => return "Section") do
    trace[debug] "The goal:{← getMainGoal}"

set_option trace.debug true in
example (h₁ : α) (h₂ : β) (h₃ : γ) : α := by
  test
    -- [debug] Section ▼
    --   [] The goal:
    -- h₁: α
    -- h₂: β
    -- h₃: γ
    -- ⊢ α

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First steps

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  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 Lean MWE in the issue and compare the displayed trace hierarchy with the expected indentation. Done means the goal and its context remain indented beneath the enclosing trace node in the VS Code extension.

Written by the indexing model from the issue text.

Assessment

Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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