Add a test showing failing closure signature inference in new solver

[compiler-errors]

Been thinking a bit about how to make this test pass... but we don't actually have any good tests exercising this behavior in the suite.

r? lcnr

[lcnr]

@bors r+ rollup

[bors]

📌 Commit 611766d has been approved by lcnr

It is now in the queue for this repository.

[bors]

⌛ Testing commit 611766d with merge 1a70c05...

[rust-log-analyzer]

The job x86_64-msvc-ext failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

tests\ui-toml\undocumented_unsafe_blocks\undocumented_unsafe_blocks.rs (default) ... ok
tests\ui-toml\undocumented_unsafe_blocks\undocumented_unsafe_blocks.rs (disabled) ... ok

tests\ui-toml\doc_valid_idents_append\doc_markdown.rs FAILED:
command: "C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\clippy-driver.exe" "--error-format=json" "--emit=metadata" "-Aunused" "-Ainternal_features" "-Zui-testing" "-Dwarnings" "-Ldependency=C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps" "--extern=clippy_lints=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libclippy_lints-5e8d785e054edb28.rlib" "--extern=clippy_utils=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libclippy_utils-0cf228b0c1780fd5.rlib" "--extern=futures=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libfutures-a074388a1bf2e009.rlib" "--extern=if_chain=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libif_chain-ba0253edeba7a8f0.rlib" "--extern=itertools=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libitertools-6894b4f3e8c5523f.rlib" "--extern=parking_lot=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libparking_lot-f87e1900e520ff9b.rlib" "--extern=quote=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libquote-3ebce4a1d5d43cf1.rlib" "--extern=regex=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libregex-3e46ad2dfdd0c657.rlib" "--extern=serde=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libserde-12500b7f802b2beb.rlib" "--extern=serde_derive=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\release\\deps\\serde_derive-67ed154847593e2b.dll" "--extern=syn=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libsyn-bc3ce53f417d339c.rlib" "--extern=tokio=\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\x86_64-pc-windows-msvc\\release\\deps\\libtokio-159ee9fbda356223.rlib" "-Ldependency=C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\release\\deps" "--out-dir" "\\\\?\\C:\\a\\rust\\rust\\build\\x86_64-pc-windows-msvc\\stage2-tools\\ui_test" "tests\\ui-toml\\doc_valid_idents_append\\doc_markdown.fixed" "--edition" "2021" "--crate-name" "doc_markdown"
called `Result::unwrap()` on an `Err` value: tests failed

Location:
    C:\Users\runneradmin\.cargo\registry\src\index.crates.io-6f17d22bba15001f\ui_test-0.20.0\src\lib.rs:362:13
    C:\Users\runneradmin\.cargo\registry\src\index.crates.io-6f17d22bba15001f\ui_test-0.20.0\src\lib.rs:362:13
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
error: test failed, to rerun pass `--test compile-test`

rustfix failed with exit code: 1

full stderr:
error: failed to write \\?\C:\a\rust\rust\build\x86_64-pc-windows-msvc\stage2-tools\ui_test\libdoc_markdown.rmeta: Access is denied. (os error 5)
error: aborting due to previous error


full stdout:

[bors]

💔 Test failed - checks-actions

[compiler-errors]

unrelated

@bors retry

[bors]

⌛ Testing commit 611766d with merge 7849162...

[bors]

☀️ Test successful - checks-actions
Approved by: lcnr
Pushing 7849162 to master...

[rust-timer]

Finished benchmarking commit (7849162): 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)	4.1%	[4.1%, 4.1%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	4.1%	[4.1%, 4.1%]	1

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)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-2.3%	[-2.3%, -2.3%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-2.3%	[-2.3%, -2.3%]	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)	4.1%	[4.1%, 4.1%]	1
Regressions ❌ (secondary)	1.6%	[1.6%, 1.6%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	4.1%	[4.1%, 4.1%]	1

Binary size

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

Bootstrap: 631.512s -> 630.86s (-0.10%)
Artifact size: 304.04 MiB -> 304.05 MiB (0.00%)