submodules: update clippy from f5d868c9 to 2f6881c6

[matthiaskrgr]

Changes:

missed another one in the README
run "util/dev update_lints"
rust-lang-nursery/rust-clippy => rust-lang/rust-clippy
Address 'clippy::single-match' dogfood lint
Fix nit
Address travis CI lint failure
Update trivially_copy_pass_by_ref with Trait stderr output
issue#3318 run trivially_copy_pass_by_ref for traits
Update trivially_copy_pass_by_ref with Trait examples
Fix awkward wording
Document how to lint local Clippy changes with locally built Clippy
Enable rustup clippy to refer to the correct documentation
rustup https://github.com/rust-lang/rust/pull/52591
remove unused allow() attributes, NFC
Add regression test
Don't emit suggestion when inside of a macro

fixes clippy toolstate

[rust-highfive]

r? @nikomatsakis

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[rust-highfive]

⚠️ Warning ⚠️

• These commits modify submodules.

[matthiaskrgr]

r? @oli-obk

[oli-obk]

@bors r+ p=1

[bors]

📌 Commit 60fe712 has been approved by oli-obk

[bors]

⌛ Testing commit 60fe712 with merge dcc47e0...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job dist-x86_64-apple of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

[00:03:25]       Memory: 8 GB
[00:03:25]       Boot ROM Version: VMW71.00V.0.B64.1704110547
[00:03:25]       Apple ROM Info: [MS_VM_CERT/SHA1/27d66596a61c48dd3dc7216fd715126e33f59ae7]Welcome to the Virtual Machine
[00:03:25]       SMC Version (system): 2.8f0
[00:03:25]       Serial Number (system): VMZB7XD4NvN+
[00:03:25] 
[00:03:25] hw.ncpu: 4
[00:03:25] hw.byteorder: 1234
[00:03:25] hw.memsize: 8589934592
---
Building stage2 tool cargo (x86_64-apple-darwin)
[01:07:24]  Downloading crates ...
[01:07:24] warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)
[01:07:24] warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)
[01:07:24] error: failed to download from `https://crates.io/api/v1/crates/openssl-src/111.0.1+1.1.1/download`
[01:07:24] Caused by:
[01:07:24]   [6] Couldn't resolve host name (Could not resolve host: crates.io)
[01:07:24] command did not execute successfully: "/Users/travis/build/rust-lang/rust/build/x86_64-apple-darwin/stage0/bin/cargo" "build" "--target" "x86_64-apple-darwin" "-j" "4" "--release" "--locked" "--color" "always" "--manifest-path" "/Users/travis/build/rust-lang/rust/src/tools/cargo/Cargo.toml" "--features" "rustc-workspace-hack/all-static" "--message-format" "json"
[01:07:24] expected success, got: exit code: 101
[01:07:24] expected success, got: exit code: 101
[01:07:24] failed to run: /Users/travis/build/rust-lang/rust/build/bootstrap/debug/bootstrap build
[01:07:24] Build completed unsuccessfully in 1:02:43
[01:07:24] make: *** [all] Error 1
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:06c44208
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Wed Nov 21 20:24:10 GMT 2018
---
travis_fold:start:after_failure.2
travis_time:start:06ce5368
$ ls -lat $HOME/Library/Logs/DiagnosticReports/
total 0
drwx------+ 15 travis  staff  510 Jan 25  2018 ..
drwx------   2 travis  staff   68 Dec  6  2017 .
travis_fold:end:after_failure.2
travis_fold:start:after_failure.3
travis_time:start:0bb41e80
$ find $HOME/Library/Logs/DiagnosticReports -type f -name '*.crash' -not -name '*.stage2-*.crash' -not -name 'com.apple.CoreSimulator.CoreSimulatorService-*.crash' -exec printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" {} \; -exec head -750 {} \; -exec echo travis_fold":"end:crashlog \; || true
$ find $HOME/Library/Logs/DiagnosticReports -type f -name '*.crash' -not -name '*.stage2-*.crash' -not -name 'com.apple.CoreSimulator.CoreSimulatorService-*.crash' -exec printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" {} \; -exec head -750 {} \; -exec echo travis_fold":"end:crashlog \; || true
travis_time:end:0bb41e80:start=1542831858705612000,finish=1542831858721634000,duration=16022000
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:11ea222f
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:017cf90a
travis_time:start:017cf90a
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:045fbb68
$ dmesg | grep -i kill
$ dmesg | grep -i kill
Unable to obtain kernel buffer: Operation not permitted
usage: sudo dmesg
travis_fold:end:after_failure.6

Done. Your build exited with 1.

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[matthiaskrgr]

Building stage2 tool cargo (x86_64-apple-darwin)
[01:07:24]  Downloading crates ...
[01:07:24] warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)
[01:07:24] warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)
[01:07:24] error: failed to download from `https://crates.io/api/v1/crates/openssl-src/111.0.1+1.1.1/download`
[01:07:24] Caused by:
[01:07:24]   [6] Couldn't resolve host name (Could not resolve host: crates.io)
[01:07:24] command did not execute successfully: "/Users/travis/build/rust-lang/rust/build/x86_64-apple-darwin/stage0/bin/cargo" "build" "--target" "x86_64-apple-darwin" "-j" "4" "--release" "--locked" "--color" "always" "--manifest-path" "/Users/travis/build/rust-lang/rust/src/tools/cargo/Cargo.toml" "--features" "rustc-workspace-hack/all-static" "--message-format" "json"
[01:07:24] expected success, got: exit code: 101
[01:07:24] expected success, got: exit code: 101

can someone retry?

[oli-obk]

@bors r+ p=1

[bors]

📌 Commit 8e814ae has been approved by oli-obk

[bors]

⌛ Testing commit 8e814ae with merge dae6c93...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: oli-obk
Pushing dae6c93 to master...

[rust-highfive]

📣 Toolstate changed by #56136!

Tested on commit dae6c93.
Direct link to PR: #56136

🎉 clippy-driver on windows: build-fail → test-pass (cc @Manishearth @llogiq @mcarton @oli-obk, @rust-lang/infra).
🎉 clippy-driver on linux: build-fail → test-pass (cc @Manishearth @llogiq @mcarton @oli-obk, @rust-lang/infra).
🎉 rls on windows: build-fail → test-pass (cc @nrc @Xanewok, @rust-lang/infra).
🎉 rls on linux: build-fail → test-pass (cc @nrc @Xanewok, @rust-lang/infra).