MaybeUninit: some docs, rename into_inner -> into_initialized, return &mut from set

[RalfJung]

No description provided.

[rust-highfive]

r? @cramertj

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[cramertj]

r=me w/ travis

[RalfJung]

@bors r=cramertj

[bors]

📌 Commit f3eede6 has been approved by cramertj

[RalfJung]

@bors r=cramertj

[bors]

📌 Commit 4853ce6 has been approved by cramertj

[bors]

⌛ Testing commit 4853ce6 with merge 2eaec1089a5637147d4f1221ee2cf7eac9e8cb74...

[bors]

💔 Test failed - checks-travis

[rust-highfive]

The job dist-various-2 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.

[01:01:31] Compiling panic_unwind v0.0.0 (/checkout/src/libpanic_unwind)
[01:01:32] [RUSTC-TIMING] panic_unwind test:false 0.290
[01:01:32] warning: dropping unsupported crate type `dylib` for target `x86_64-fortanix-unknown-sgx`
[01:01:32] [01:01:35] error[E0624]: method `into_inner` is private
[01:01:35] --> src/libstd/sys/sgx/ext/arch.rs:44:25
[01:01:35] |
[01:01:35] 44 | 0 => Ok(out.into_inner()),
[01:01:35] [01:01:35] error[E0624]: method `into_inner` is private
[01:01:35] error[E0624]: method `into_inner` is private
[01:01:35] --> src/libstd/sys/sgx/ext/arch.rs:72:16
[01:01:35] 72 | report.into_inner()
[01:01:35] | ^^^^^^^^^^
[01:01:35] [01:01:37] error: aborting due to 2 previous errors
---
travis_time:end:0ddf7486:start=1549821839519904601,finish=1549821839535653988,duration=15749387
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:1aaf1660
$ 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:33a39318
travis_time:start:33a39318
$ 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:0722a705
$ dmesg | grep -i kill

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)

[RalfJung]

I think this should fix the SGX failures, but I don't know how to test that locally...

@bors r=cramertj

[bors]

📌 Commit 4833074 has been approved by cramertj

[bors]

⌛ Testing commit 4833074 with merge 0b7af26...

[bors]

☀️ Test successful - checks-travis, status-appveyor
Approved by: cramertj
Pushing 0b7af26 to master...