Rollup of 15 pull requests

[kennytm]

Successful merges:

• Add another PartialEq example #51760 (Add another PartialEq example)
• Add example for Cow #53113 (Add example for Cow)
• remove let x = baz which was obscuring the real error #53129 (remove let x = baz which was obscuring the real error)
• document effect of join on memory ordering #53389 (document effect of join on memory ordering)
• Use FxHash{Map,Set} instead of the default Hash{Map,Set} everywhere in rustc. #53472 (Use FxHash{Map,Set} instead of the default Hash{Map,Set} everywhere in rustc.)
• Force-inline shallow_resolve at its hottest call site. #53513 (Force-inline shallow_resolve at its hottest call site.)
• cleanup: Add main functions to some UI tests #53622 (cleanup: Add main functions to some UI tests)
• set applicability #53655 (set applicability)
• Fix stabilisation version for macro_vis_matcher. #53702 (Fix stabilisation version for macro_vis_matcher.)
• Do not suggest dereferencing in macro #53727 (Do not suggest dereferencing in macro)
• save-analysis: Differentiate foreign functions and statics. #53732 (save-analysis: Differentiate foreign functions and statics.)
• fix a typo: taget_env -> target_env #53743 (fix a typo: taget_env -> target_env)
• Rustdoc fixes #53747 (Rustdoc fixes)
• expand keep-stage --help text #53753 (expand keep-stage --help text)
• Update clippy submodule #53758 (Update clippy submodule)

Failed merges:

r? @ghost

[kennytm]

@bors r+ p=15

[bors]

📌 Commit bbe0a8e has been approved by kennytm

[bors]

⌛ Testing commit bbe0a8e with merge 7caf3090b47ff16b1012b107eca81d9b16bbf270...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job dist-x86_64-musl 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.

[00:45:11] 
[00:45:11] ---- [ui] ui/panic-runtime/runtime-depend-on-needs-runtime.rs stdout ----
[00:45:11] diff of stderr:
[00:45:11] 
[00:45:11] 1 error: the crate `depends` cannot depend on a crate that needs a panic runtime, but it depends on `needs_panic_runtime`
[00:45:11] - error: aborting due to previous error
[00:45:11] - error: aborting due to previous error
[00:45:11] + error: language item required, but not found: `eh_personality`
[00:45:11] + error: aborting due to 2 previous errors
[00:45:11] 4 
[00:45:11] 5 
[00:45:11] 
[00:45:11] 
[00:45:11] 
[00:45:11] The actual stderr differed from the expected stderr.
[00:45:11] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/panic-runtime/runtime-depend-on-needs-runtime/runtime-depend-on-needs-runtime.stderr
[00:45:11] To update references, rerun the tests and pass the `--bless` flag
[00:45:11] To only update this specific test, also pass `--test-args panic-runtime/runtime-depend-on-needs-runtime.rs`
[00:45:11] error: 1 errors occurred comparing output.
[00:45:11] status: exit code: 1
[00:45:11] status: exit code: 1
[00:45:11] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/panic-runtime/runtime-depend-on-needs-runtime.rs" "--target=x86_64-unknown-linux-musl" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/panic-runtime/runtime-depend-on-needs-runtime/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-musl/native/rust-test-helpers" "-Clinker=/musl-x86_64/bin/musl-gcc" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/panic-runtime/runtime-depend-on-needs-runtime/auxiliary" "-A" "unused"
[00:45:11] ------------------------------------------
[00:45:11] 
[00:45:11] ------------------------------------------
[00:45:11] stderr:
[00:45:11] stderr:
[00:45:11] ------------------------------------------
[00:45:11] {"message":"the crate `depends` cannot depend on a crate that needs a panic runtime, but it depends on `needs_panic_runtime`","code":null,"level":"error","spans":[],"children":[],"rendered":"error: the crate `depends` cannot depend on a crate that needs a panic runtime, but it depends on `needs_panic_runtime`\n\n"}
[00:45:11] {"message":"language item required, but not found: `eh_personality`","code":null,"level":"error","spans":[],"children":[],"rendered":"error: language item required, but not found: `eh_personality`\n\n"}
[00:45:11] {"message":"aborting due to 2 previous errors","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to 2 previous errors\n\n"}
[00:45:11] ------------------------------------------
[00:45:11] 
[00:45:11] thread '[ui] ui/panic-runtime/runtime-depend-on-needs-runtime.rs' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:3196:9
[00:45:11] note: Run with `RUST_BACKTRACE=1` for a backtrace.
---
[00:45:11] 
[00:45:11] thread 'main' panicked at 'Some tests failed', tools/compiletest/src/main.rs:497:22
[00:45:11] 
[00:45:11] 
[00:45:11] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--stage-id" "stage2-x86_64-unknown-linux-musl" "--mode" "ui" "--target" "x86_64-unknown-linux-musl" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/checkout/obj/build/x86_64-unknown-linux-gnu/llvm/build/bin/FileCheck" "--linker" "/musl-x86_64/bin/musl-gcc" "--host-rustcflags" "-Crpath -O -Zunstable-options " "--target-rustcflags" "-Crpath -O -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-musl/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--llvm-version" "7.0.0\n" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--llvm-cxxflags" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
[00:45:11] 
[00:45:11] 
[00:45:11] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test --target x86_64-unknown-linux-musl
[00:45:11] Build completed unsuccessfully in 0:41:35
---
travis_time:end:159dd4c8:start=1535489202835395418,finish=1535489202843827756,duration=8432338
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:005f8aac
$ 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 -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:03d5eefa
travis_time:start:03d5eefa
$ 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:230a2943
$ dmesg | grep -i kill

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