Revert "feat: implement hash_map! macro"

[cuviper]

Crater for 1.91-beta found that this unstable macro caused ambiguity in the ecosystem: #147971

Since we are very close to release, it's probably best to just revert the macro for now, and re-add it later in a less invasive way -- i.e. not a top-level macro, and not in the prelude until a future edition (as noted here).

@rustbot label beta-nominated

[rustbot]

r? @Mark-Simulacrum

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[rustbot]

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  • a81ed52

[BoxyUwU]

lgtm but probably you want a libs reviewer

[Mark-Simulacrum]

@bors r+

[bors]

📌 Commit c01682e has been approved by Mark-Simulacrum

It is now in the queue for this repository.

[bors]

⌛ Testing commit c01682e with merge 38bc246...

[bors]

☀️ Test successful - checks-actions
Approved by: Mark-Simulacrum
Pushing 38bc246 to master...

[github-actions]

What is this?

This is an experimental post-merge analysis report that shows differences in test outcomes between the merged PR and its parent PR.

Comparing 27050c0 (parent) -> 38bc246 (this PR)

Test differences

Show 5 test diffs

5 doctest diffs were found. These are ignored, as they are noisy.

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard 38bc2468dea062750e767bdd5c25f8279275baa0 --output-dir test-dashboard

And then open test-dashboard/index.html in your browser to see an overview of all executed tests.

Job duration changes

1. x86_64-gnu: 6821.9s -> 7666.1s (12.4%)
2. dist-apple-various: 4000.4s -> 3617.9s (-9.6%)
3. x86_64-msvc-ext2: 5857.0s -> 5348.5s (-8.7%)
4. dist-arm-linux-gnueabi: 4799.8s -> 5209.5s (8.5%)
5. dist-i686-linux: 6065.4s -> 6570.7s (8.3%)
6. aarch64-msvc-2: 4665.1s -> 5020.3s (7.6%)
7. dist-i586-gnu-i586-i686-musl: 5032.5s -> 5389.5s (7.1%)
8. x86_64-msvc-ext1: 7071.0s -> 7557.9s (6.9%)
9. dist-ohos-x86_64: 4287.9s -> 4005.9s (-6.6%)
10. x86_64-msvc-2: 6626.6s -> 7049.2s (6.4%)

How to interpret the job duration changes?

Job durations can vary a lot, based on the actual runner instance
that executed the job, system noise, invalidated caches, etc. The table above is provided
mostly for t-infra members, for simpler debugging of potential CI slow-downs.

[rust-timer]

Finished benchmarking commit (38bc246): comparison URL.

Overall result: ❌✅ regressions and improvements - no action needed

@rustbot label: -perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	0.1%	[0.1%, 0.1%]	1
Regressions ❌ (secondary)	0.1%	[0.1%, 0.1%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.7%	[-1.3%, -0.1%]	2
All ❌✅ (primary)	0.1%	[0.1%, 0.1%]	1

Max RSS (memory usage)

Results (primary 0.5%, secondary 1.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	1.8%	[1.8%, 1.8%]	1
Regressions ❌ (secondary)	2.2%	[1.6%, 2.8%]	2
Improvements ✅ (primary)	-0.7%	[-0.7%, -0.7%]	1
Improvements ✅ (secondary)	-1.4%	[-1.4%, -1.4%]	1
All ❌✅ (primary)	0.5%	[-0.7%, 1.8%]	2

Cycles

Results (secondary -1.5%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.7%	[2.7%, 2.7%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.6%	[-4.7%, -2.5%]	2
All ❌✅ (primary)	-	-	0

Binary size

Results (secondary -0.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.0%	[-0.0%, -0.0%]	1
All ❌✅ (primary)	-	-	0

Bootstrap: 474.745s -> 473.974s (-0.16%)
Artifact size: 390.51 MiB -> 390.47 MiB (-0.01%)

[cuviper]

I hesitate to backport-approve my own PR, but time is short and it's just an unstable revert, and we did discuss this plan in the libs meeting beforehand.

@rustbot label +beta-accepted