Make fmt downloaded on every invocation of bootstrap

[reez12g]

Fixes #101306

[rust-highfive]

r? @jyn514

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[jyn514]

@bors delegate=reez12g

[bors]

✌️ @reez12g can now approve this pull request

[reez12g]

@bors r+

[bors]

📌 Commit 9f201d6 has been approved by reez12g

It is now in the queue for this repository.

[bors]

⌛ Testing commit 9f201d6 with merge c5b105d...

[bors]

☀️ Test successful - checks-actions
Approved by: reez12g
Pushing c5b105d to master...

[TimNN]

I believe this breaks the clean subcommand, due to this panic:

rust/src/bootstrap/builder.rs

Line 821 in c5b105d

panic!()

(See also this custom CI bot).

[rust-timer]

Finished benchmarking commit (c5b105d): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

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

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.4%	[-1.4%, -1.4%]	1
Improvements ✅ (secondary)	-3.6%	[-3.6%, -3.6%]	1
All ❌✅ (primary)	-1.4%	[-1.4%, -1.4%]	1

Cycles

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.6%	[2.1%, 5.1%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-4.4%	[-4.4%, -4.4%]	1
All ❌✅ (primary)	-	-	0

Footnotes

1. the arithmetic mean of the percent change ↩ ↩²

2. number of relevant changes ↩ ↩²