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Hovering help for 'obtain' tactic unexpectedly fail in one of the two example lemmas in the same window. Tested in Firefox and Chromium.
```
import Mathlib.Data.Complex.Basic
example (a b a'…
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Hi,
I am reading _Theorem Proving in Lean 4_ on VSCodium. I have installed the common lean4 extension. But some graphics is missing as evidences by this picture?
![image](https://github.com/leanpr…
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### Prerequisites
Please put an X between the brackets as you perform the following steps:
* [x] Check that your issue is not already filed:
https://github.com/leanprover/lean4/issues
* …
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Possibly having a reminder in the installation instructions to add /*/lean4/build/release/stage1/bin to your path in your .bashrc could be helpful.
dsb-y updated
10 months ago
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Lean4's `≤` does not match lean3's `≤` on nats. In lean3, nat.le are inductive whereas in lean4, Nat.le is defined as the boolean version returning true. I think this instance clash will cause big pro…
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I haven't quite figured out the MWE yet. Possibly a vscode-lean4 bug.
There seem to be certain files for me where vscode and Lean will stop talking to each other. I have observed this a few times b…
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I have a GH Actions workflow where I'm trying to configure a local binary cache restored from actions/cache, as that is quite a bit faster than always querying Cachix:
```
- uses: cachix/insta…
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```lean
declare_syntax_cat compClause
syntax "for " term " in " term : compClause
syntax "if " term : compClause
syntax "[" term " | " compClause,* "]" : term
macro_rules
| `([$t:term |]) …
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### Prerequisites
Please put an X between the brackets as you perform the following steps:
* [x] Check that your issue is not already filed:
https://github.com/leanprover/lean4/issues
* …
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I have the Chrome Gitpod extension installed, and when I click on the Gitpod button
that appears on the page, it opens up a VSCode environment, showing the following
messages in the terminal window:…