Do not propogate unnecessary closure constraints.

[LorrensP-2158466]

Fixes #148289
Fixes case 1 of #104477 (it's the same as #148289)
Should unblock #148187

Instead of propagating every fr-: shorter_fr+ we find, only propagate those that matter to the closure in question. This could otherwise cause valid code to be rejected.

r? @lcnr

[rustbot]

Some changes occurred in src/tools/cargo

cc @ehuss

[LorrensP-2158466]

Excuse me ehuss for the automatic ping, I was a bit too fast with pushing the typo fixes reported by the tidy job.

[lcnr]

@bors try @rust-timer

let's do a crater run, even if I think it should be fine. Then I/we need to write an FCP proposal 😁

[LorrensP-2158466]

let's do a crater run, even if I think it should be fine. Then I/we need to write an FCP proposal 😁

Alright!

[LorrensP-2158466]

Then I/we need to write an FCP proposal 😁

BTW, I would love to help with this if isn't to much to ask. I have never done it, so I might as well get some experience. :)

[rust-bors]

☀️ Try build successful (CI)
Build commit: f27166d (f27166d4c64dc29edc5ea3214357f191edf8b635, parent: f5711a55f5d5e2f942057d0f6d648dd2d8b2c37b)

[lcnr]

@craterbot check

[craterbot]

👌 Experiment pr-148329 created and queued.
🤖 Automatically detected try build f27166d
🔍 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

[Kobzol]

@rust-timer build f27166d

[rust-timer]

Finished benchmarking commit (f27166d): comparison URL.

Overall result: no relevant changes - no action needed

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

@bors rollup=never
@rustbot label: -S-waiting-on-perf -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

This benchmark run did not return any relevant results for this metric.

Cycles

Results (secondary -4.7%)

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)	-4.7%	[-5.4%, -4.0%]	2
All ❌✅ (primary)	-	-	0

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 474.205s -> 473.796s (-0.09%)
Artifact size: 390.90 MiB -> 390.90 MiB (0.00%)