This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/setup-python](https://redirect.github.com/actions/setup-python)
| action | digest | `4237552` -> `8d9ed9a` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [astral-sh/setup-uv](https://redirect.github.com/astral-sh/setup-uv) |
action | digest | `2269511` -> `0c5e2b8` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
|
[taiki-e/install-action](https://redirect.github.com/taiki-e/install-action)
| action | digest | `914ac1e` -> `6aca1cf` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
|
[webfactory/ssh-agent](https://redirect.github.com/webfactory/ssh-agent)
| action | patch | `v0.9.0` -> `v0.9.1` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Release Notes
<details>
<summary>webfactory/ssh-agent (webfactory/ssh-agent)</summary>
###
[`v0.9.1`](https://redirect.github.com/webfactory/ssh-agent/blob/HEAD/CHANGELOG.md#v091-2024-03-17)
[Compare
Source](https://redirect.github.com/webfactory/ssh-agent/compare/v0.9.0...v0.9.1)
##### Fixed
- Fix path used to execute ssh-agent in cleanup.js to respect custom
paths set by input
([#​235](https://redirect.github.com/webfactory/ssh-agent/issues/235))
</details>
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Following
29573daef5,
it doesn't look to me like any of the pre-commit hooks run in CI here
are Rust-based:
- `cargo fmt` is Rust-based but it's explicitly skipped as part of this
job and run as a separate CI job:
93052331b0/.pre-commit-config.yaml (L124-L125)
- The `typos` hook is Rust-based, but according to
https://github.com/crate-ci/typos/blob/master/docs/pre-commit.md
pre-commit should install a built binary rather than building the binary
from source
As such, I think this step in the workflow is just taking up 15s of CI
time and not actually speeding up pre-commit at all
## Summary
Move the mypy_primer build to the depot runners to speed them up.
## Test Plan
Previous run of mypy_primer: 3m 49s
Run on this branch: 1m 38s
## Summary
Use a debug build instead of a release build in order to speed up
mypy_primer runs.
## Test Plan
Previous mypy_primer run: 5m 45s
mypy_primer run on this branch: 3m 49s
This is a well-typed codebase on which we only emit 23 diagnostics right
now, but which is highlighting some interesting issues. It uses some
modern syntactic features such as `match` statements that aren't used
much in other open-source projects in mypy_primer
## Summary
Return the revealed-type from the monkey-patched `revale_type`
implementation to
preserve the identity behavior.
This PR also isolates different script runs by assigning a different
`globals` dict for each script-run. See
https://github.com/pyodide/pyodide/issues/703
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [PyO3/maturin-action](https://redirect.github.com/PyO3/maturin-action)
| action | digest | `36db840` -> `22fe573` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [astral-sh/setup-uv](https://redirect.github.com/astral-sh/setup-uv) |
action | digest | `f94ec6b` -> `2269511` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
|
[taiki-e/install-action](https://redirect.github.com/taiki-e/install-action)
| action | digest | `2c41309` -> `914ac1e` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [actions/cache](https://redirect.github.com/actions/cache) | action |
digest | `d4323d4` -> `5a3ec84` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/upload-artifact](https://redirect.github.com/actions/upload-artifact)
| action | digest | `4cec3d8` -> `ea165f8` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/download-artifact](https://redirect.github.com/actions/download-artifact)
| action | digest | `cc20338` -> `95815c3` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [Swatinem/rust-cache](https://redirect.github.com/Swatinem/rust-cache)
| action | digest | `f0deed1` -> `9d47c6a` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
`base.sha` appears to be the commit of the base branch when the pull
request was opened, not the base commit that's used to construct the
test merge commit — which can lead to incorrect "determine changes"
results where commits made to the base ref since the pull request are
opened are included in the results.
We use `git merge-base` to find the correct sha, as I don't think that
GitHub provides this. They provide `merge_commit_sha` but my
understanding is that is equivalent to the actual merge commit we're
testing in CI.
I tested this locally on an example pull request. I don't think it's
worth trying to reproduce a specific situation here.
---------
Co-authored-by: Alex Waygood <alex.waygood@gmail.com>
## Summary
This PR adds a playground for Red Knot
[Screencast from 2024-08-14
10-33-54.webm](https://github.com/user-attachments/assets/ae81d85f-74a3-4ba6-bb61-4a871b622f05)
Sharing does work 😆 I just forgot to start wrangler.
It supports:
* Multiple files
* Showing the AST
* Showing the tokens
* Sharing
* Persistence to local storage
Future extensions:
* Configuration support: The `pyproject.toml` would *just* be another
file.
* Showing type information on hover
## Blockers
~~Salsa uses `catch_unwind` to break cycles, which Red Knot uses
extensively when inferring types in the standard library.
However, WASM (at least `wasm32-unknown-unknown`) doesn't support
`catch_unwind` today, so the playground always crashes when the type
inference encounters a cycle.~~
~~I created a discussion in the [salsa
zulip](https://salsa.zulipchat.com/#narrow/stream/333573-salsa-3.2E0/topic/WASM.20support)
to see if it would be possible to **not** use catch unwind to break
cycles.~~
~~[Rust tracking issue for WASM catch unwind
support](https://github.com/rust-lang/rust/issues/118168)~~
~~I tried to build the WASM with the nightly compiler option but ran
into problems because wasm-bindgen doesn't support WASM-exceptions. We
could try to write the binding code by hand.~~
~~Another alternative is to use `wasm32-unknown-emscripten` but it's
rather painful to build~~
## Summary
This is prep-work for the Red Knot playground. We'll have two
playgrounds, one for Red Knot and Ruff.
I want to share some components between the two, a "shared" NPM package
in a local workspace is a great fit for that.
I also want to share the dev dependencies and dev scripts. Again, NPM
workspaces are great for that.
This PR also sets up a CI workflow for the playground to prevent
surprises during the release.
## Test Plan
CI, local `npm install`, `npm start`, ...
I verified that the new CI step fails if there's a typescript or
formatting error.
* [Deployment test
run](https://github.com/astral-sh/ruff/actions/runs/13904914480/job/38905524353)
## Summary
The PPC64le wheel testing job spuriously failes due to some race when
installing python dependencies.
This is very annoying because it requires restarting the release process
over and over again until you're lucky and it passes.
This PR disables wheel testing on PPC64le
This is the same as we did in uv, see
https://github.com/astral-sh/uv/issues/11231
## Test Plan
The wheel test step was skipped in CI, see
https://github.com/astral-sh/ruff/actions/runs/13895143309/job/38874065160?pr=16793
but it still runs for other targets
## Summary
Use bash and `git diff` to determine which steps need to run.
We previously used the `changed-files` github actions but using `git`
directly seems simple enough.
All credit for the bash magic goes to @zanieb and @geofft. All I did was
replace the paths arguments.
## Test Plan
* [Linter only change](https://github.com/astral-sh/ruff/pull/16800):
See how the fuzzer and formatter steps, and the linter ecosystem checks
are skipped
* [Formatter only change](https://github.com/astral-sh/ruff/pull/16799):
See how the fuzzer and linter ecosystem checks are skipped
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
|
[cloudflare/wrangler-action](https://redirect.github.com/cloudflare/wrangler-action)
| action | patch | `v3.14.0` -> `v3.14.1` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Release Notes
<details>
<summary>cloudflare/wrangler-action
(cloudflare/wrangler-action)</summary>
###
[`v3.14.1`](https://redirect.github.com/cloudflare/wrangler-action/releases/tag/v3.14.1)
[Compare
Source](https://redirect.github.com/cloudflare/wrangler-action/compare/v3.14.0...v3.14.1)
##### Patch Changes
-
[#​358](https://redirect.github.com/cloudflare/wrangler-action/pull/358)
[`cd6314a`](cd6314a97b)
Thanks [@​penalosa](https://redirect.github.com/penalosa)! - Use
`secret bulk` instead of deprecated `secret:bulk` command
</details>
---
### Configuration
📅 **Schedule**: Branch creation - "before 4am on Monday" (UTC),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.
---
- [x] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box
---
This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDAuMCIsInVwZGF0ZWRJblZlciI6IjM5LjIwMC4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJpbnRlcm5hbCJdfQ==-->
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
## Summary
The intent here is that all actions should be pinned to an immutable SHA
(but that Renovate should annotate each SHA with the corresponding
SemVer version).
See https://github.com/astral-sh/uv/pull/12189
## Test plan
```
npx --yes --package renovate -- renovate-config-validator
npm warn deprecated inflight@1.0.6: This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.
npm warn deprecated rimraf@2.4.5: Rimraf versions prior to v4 are no longer supported
npm warn deprecated boolean@3.2.0: Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.
npm warn deprecated glob@6.0.4: Glob versions prior to v9 are no longer supported
INFO: Validating .github/renovate.json5
INFO: Config validated successfully
```
## Summary
tj-actions/changed-files no longer exists due to a malicious commit.
This PR removes it so that we can re-enable CI.
We can follow up with a proper replacement in a separate PR
## Summary
The ecosystem checks have proven useful so far, so I'm extending the
list a bit. My main selection criteria are:
- Few dependencies (we don't understand -stubs/-types packages yet)
- Fewer than 1000 diagnostics
- No panics
## Test Plan
Ran it locally. We now have ~2k diagnostics in total, across 12 projects
## Summary
I noticed that the pipeline can succeed if there are problems with tool
installation or dependency resolution. This change makes sure that the
pipeline fails in these cases.
## Summary
Add a new pipeline to comment on PRs if there is a mypy_primer diff
result.
## Test Plan
Not yet, I'm afraid I will have to merge this first to have the pipeline
available on main.
Regardless of whether #16408 and #16311 pan out, this part is worth
pulling out as a separate PR.
Before, you had to define a new `IndexVec` index type for each type of
association list you wanted to create. Now there's a single index type
that's internal to the alist implementation, and you use `List<K, V>` to
store a handle to a particular list.
This also adds some property tests for the alist implementation.
