stabilize a bunch of minor api additions

[tinaun]

besides ptr::NonNull::cast (which is 4 days away from end of FCP) all of these have been finished with FCP for a few weeks now with minimal issues raised

• Closes Tracking issue for [T]::rsplit and [T]::rsplit_mut #41020
• Closes Tracking issue for ptr::swap_nonoverlapping (library feature swap_nonoverlapping) #42818
• Closes Tracking issue for [T]::swap_with_slice feature #44030
• Closes Consider adding a from_micros for std::time::Duration #44400
• Closes Tracking issue for extra Duration methods #46507
• Closes Tracking issue for std::ptr::NonNull::cast #47653
• Closes Tracking issue for HashMap::remove_entry #46344

the following functions will be stabilized in 1.27:

• [T]::rsplit
• [T]::rsplit_mut
• [T]::swap_with_slice
• ptr::swap_nonoverlapping
• NonNull::cast
• Duration::from_micros
• Duration::from_nanos
• Duration::subsec_millis
• Duration::subsec_micros
• HashMap::remove_entry

[rust-highfive]

r? @sfackler

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[rust-highfive]

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.

[00:00:50] configure: rust.quiet-tests     := True
---
[00:03:06] error[E0541]: unknown meta item 'issue'
[00:03:06]    --> libcore/time.rs:168:43
[00:03:06]     |
[00:03:06] 168 |     #[stable(feature = "duration_extras", issue = "1.27.0")]
---
[00:03:27] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "--target" "x86_64-unknown-linux-gnu" "--release" "--locked" "--color" "always" "--features" "panic-unwind jemalloc backtrace" "--manifest-path" "/checkout/src/libstd/Cargo.toml" "--message-format" "json"
[00:03:27] expected success, got: exit code: 101
[00:03:27] thread 'main' panicked at 'cargo must succeed', bootstrap/compile.rs:1085:9
[00:03:27] note: Run with `RUST_BACKTRACE=1` for a backtrace.
[00:03:27] travis_fold:end:stage0-std
[00:03:27] travis_time:end:stage0-std:start=1523942275425743987,finish=1523942301523247101,duration=26097503114
[00:03:27] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
[00:03:27] Build completed unsuccessfully in 0:00:27
[00:03:27] Makefile:79: recipe for target 'tidy' failed
[00:03:27] make: *** [tidy] Error 1
---
$ ls -lat $HOME/Library/Logs/DiagnosticReports/
ls: cannot access /home/travis/Library/Logs/DiagnosticReports/: No such file or directory
travis_time:end:081e1704:start=1523942302010125166,finish=1523942302017219719,duration=7094553
travis_fold:end:after_failure.2
travis_fold:start:after_failure.3
travis_time:start:04acdaa4
$ 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/travis/Library/Logs/DiagnosticReports': No such file or directory
travis_time:end:04acdaa4:start=1523942302023102973,finish=1523942302030158280,duration=7055307
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:174a5ce7
$ dmesg | grep -i kill
[   10.558849] init: failsafe main process (1094) killed by TERM signal

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)

[sfackler]

@bors r+

Thanks!

[bors]

📌 Commit fd042ee has been approved by sfackler

[bors]

⌛ Testing commit fd042ee with merge ac3c228...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: sfackler
Pushing ac3c228 to master...