[crater] Remove LArrow

[compiler-errors]

🔪

r? @ghost

[compiler-errors]

@bors try

[bors]

⌛ Trying commit 1e147b4 with merge 3931cbb...

[rust-log-analyzer]

The job mingw-check failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

GITHUB_ENV=/home/runner/work/_temp/_runner_file_commands/set_env_21baf634-64e4-44c7-aea0-b04a478e597e
GITHUB_EVENT_NAME=pull_request
GITHUB_EVENT_PATH=/home/runner/work/_temp/_github_workflow/event.json
GITHUB_GRAPHQL_URL=https://api.github.com/graphql
GITHUB_HEAD_REF=larrow
GITHUB_JOB=pr
GITHUB_PATH=/home/runner/work/_temp/_runner_file_commands/add_path_21baf634-64e4-44c7-aea0-b04a478e597e
GITHUB_REF=refs/pull/118920/merge
GITHUB_REF_NAME=118920/merge
GITHUB_REF_PROTECTED=false
---
    Checking toml_edit v0.19.11
    Checking serde_json v1.0.99
    Checking cargo_metadata v0.15.4
    Checking toml v0.7.5
error[E0599]: no variant or associated item named `LArrow` found for enum `TokenKind` in the current scope
     |
     |
1063 |         | TokenKind::LArrow
     |                      |
     |                      variant or associated item not found in `TokenKind`
     |                      help: there is a variant with a similar name: `RArrow`

[bors]

☀️ Try build successful - checks-actions
Build commit: 3931cbb (3931cbb869e499bf6db1e4d580cc247efbf183df)

[compiler-errors]

@craterbot check

[craterbot]

👌 Experiment pr-118920 created and queued.
🤖 Automatically detected try build 3931cbb
🔍 You can check out the queue and this experiment's details.

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

[Skgland]

Rust-for-Linux appears to uses <- in their pin_init! macro e.g. https://github.com/Rust-for-Linux/linux/blob/rust-next/rust/kernel/sync/condvar.rs#L99

[compiler-errors]

@Skgland: This shouldn't affect that macro unless it's actually choosing between <- and < - in the macro definition, which it seems it doesn't.

The only side-effect is that it causes field < - expr to work, since <- is now two tokens.

[craterbot]

🚧 Experiment pr-118920 is now running

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

[craterbot]

🎉 Experiment pr-118920 is completed!
📊 33 regressed and 3 fixed (399389 total)
📰 Open the full report.

⚠️ If you notice any spurious failure please add them to the blacklist!
ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

[compiler-errors]

@craterbot check crates=https://crater-reports.s3.amazonaws.com/pr-118920/retry-regressed-list.txt

[craterbot]

👌 Experiment pr-118920-1 created and queued.
🤖 Automatically detected try build 3931cbb
🔍 You can check out the queue and this experiment's details.

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

[craterbot]

🚧 Experiment pr-118920-1 is now running

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

[craterbot]

🎉 Experiment pr-118920-1 is completed!
📊 30 regressed and 0 fixed (33 total)
📰 Open the full report.

⚠️ If you notice any spurious failure please add them to the blacklist!
ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

[compiler-errors]

There are real crate breakages here. I don't believe we will be able to remove LArrow from the language without breaking existing macros.

[petrochenkov]

I don't think we need to remove it in the first place.
It's a good looking operator with a high chance of being used in the future.