Rollup of 4 pull requests

[aliemjay]

Successful merges:

• Add explicit-endian String::from_utf16 variants #95967 (Add explicit-endian String::from_utf16 variants)
• delay a bug when encountering an ambiguity in MIR typeck #116530 (delay a bug when encountering an ambiguity in MIR typeck)
• Document diagnostic_namespace feature #116611 (Document diagnostic_namespace feature)
• Remove unused dominator iterator #116612 (Remove unused dominator iterator)

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

[aliemjay]

@bors r+ rollup=never p=5

[bors]

📌 Commit 88a929b has been approved by aliemjay

It is now in the queue for this repository.

[bors]

⌛ Testing commit 88a929b with merge 36cbf94...

[bors]

☀️ Test successful - checks-actions
Approved by: aliemjay
Pushing 36cbf94 to master...

[rust-timer]

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#95967	Add explicit-endian String::from_utf16 variants	9b60ec14490509ce68831b735a308077e7ab4611 (link)
#116530	delay a bug when encountering an ambiguity in MIR typeck	33c0dec1710ec3ffdb632dccf15391a3f217f5df (link)
#116611	Document diagnostic_namespace feature	54af23bb8220412e4280d14bbed3c7a00fbab5be (link)
#116612	Remove unused dominator iterator	82fb93698f18c9816efe65527d027524964f46c4 (link)

previous master: dcf89f43a5

In the case of a perf regression, run the following command for each PR you suspect might be the cause: @rust-timer build $SHA

[rust-timer]

Finished benchmarking commit (36cbf94): comparison URL.

Overall result: ❌ regressions - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.4%	[0.1%, 0.7%]	6
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

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.

	mean	range	count
Regressions ❌ (primary)	2.2%	[2.2%, 2.2%]	1
Regressions ❌ (secondary)	1.5%	[0.9%, 2.0%]	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-1.4%	[-1.4%, -1.4%]	1
All ❌✅ (primary)	2.2%	[2.2%, 2.2%]	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.

	mean	range	count
Regressions ❌ (primary)	1.7%	[0.9%, 3.0%]	3
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.7%	[0.9%, 3.0%]	3

Binary size

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.

	mean	range	count
Regressions ❌ (primary)	1.0%	[0.1%, 1.7%]	24
Regressions ❌ (secondary)	1.6%	[1.0%, 1.7%]	74
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.0%	[0.1%, 1.7%]	24

Bootstrap: 628.069s -> 627.208s (-0.14%)
Artifact size: 270.78 MiB -> 270.95 MiB (0.06%)