-Znext-solver Less normalizes-to janks

[ShoyuVanilla]

cc rust-lang/trait-system-refactor-initiative#223 (comment)

r? lcnr

[rustbot]

Some changes occurred to the core trait solver

cc @rust-lang/initiative-trait-system-refactor

changes to inspect_obligations.rs

cc @lcnr

This PR modifies tests/ui/issues/. If this PR is adding new tests to tests/ui/issues/,
please refrain from doing so, and instead add it to more descriptive subdirectories.

[ShoyuVanilla]

@bors try @rust-timer queue

[ShoyuVanilla]

I haven't done the nested goals' recursion depth part yet 😅 I'm gonna work on it if the overall design here pan out to be feasible

[rust-bors]

☀️ Try build successful (CI)
Build commit: d4c528b (d4c528b37c59bf04c41ddba6375584d284d1a9ba, parent: 88ba7fbe0a6eda36e0adbfd0482856f3784031b9)

[rust-timer]

Finished benchmarking commit (d4c528b): comparison URL.

Overall result: ❌✅ regressions and improvements - please read:

Benchmarking means the PR may be perf-sensitive. It's automatically marked not fit for rolling up. Overriding is possible but disadvised: it risks changing compiler perf.

Next, please: If you can, justify the regressions found in this try perf run in writing along with @rustbot label: +perf-regression-triaged. If not, fix the regressions and do another perf run. Neutral or positive results will clear the label automatically.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +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)	0.4%	[0.3%, 0.8%]	7
Regressions ❌ (secondary)	22.5%	[0.6%, 46.0%]	12
Improvements ✅ (primary)	-0.3%	[-0.7%, -0.1%]	20
Improvements ✅ (secondary)	-0.3%	[-0.6%, -0.2%]	29
All ❌✅ (primary)	-0.1%	[-0.7%, 0.8%]	27

Max RSS (memory usage)

Results (primary 1.5%, secondary 8.5%)

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

	mean	range	count
Regressions ❌ (primary)	1.5%	[0.9%, 2.6%]	5
Regressions ❌ (secondary)	11.4%	[2.0%, 25.8%]	8
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-14.8%	[-14.8%, -14.8%]	1
All ❌✅ (primary)	1.5%	[0.9%, 2.6%]	5

Cycles

Results (secondary 26.9%)

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)	26.9%	[17.5%, 41.5%]	9
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

Bootstrap: 510.626s -> 509.733s (-0.17%)
Artifact size: 398.07 MiB -> 398.06 MiB (-0.00%)

[ShoyuVanilla]

Oh, the perf regressions are insane 😅 I'll look into them