[beta] Rollup backports

[pietroalbini]

Approved for backport:

• Update books #56373: Update books

r? @ghost
cc @Mark-Simulacrum @steveklabnik

[pietroalbini]

@bors r+ p=100

[bors]

📌 Commit c3c2c81 has been approved by pietroalbini

[bors]

⌛ Testing commit c3c2c81 with merge 142b7ec0e73b186ce90296d96ce75f38db6298e5...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job x86_64-gnu-tools 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.

[00:00:42] Cleared directory 'src/tools/rls'
[00:00:42] Cleared directory 'src/tools/rust-installer'
[00:00:43] Cleared directory 'src/tools/rustfmt'
[00:00:43] Submodule 'src/dlmalloc' (/~https://github.com/alexcrichton/dlmalloc-rs.git) registered for path 'src/dlmalloc'
[00:00:43] Submodule 'src/doc/edition-guide' (/~https://github.com/rust-lang-nursery/edition-guide) registered for path 'src/doc/edition-guide'
[00:00:43] Submodule 'src/doc/reference' (/~https://github.com/rust-lang-nursery/reference.git) registered for path 'src/doc/reference'
[00:00:43] Submodule 'src/jemalloc' (/~https://github.com/rust-lang/jemalloc.git) registered for path 'src/jemalloc'
[00:00:43] Submodule 'src/libbacktrace' (/~https://github.com/rust-lang-nursery/libbacktrace.git) registered for path 'src/libbacktrace'
[00:00:43] Submodule 'src/libcompiler_builtins' (/~https://github.com/rust-lang-nursery/compiler-builtins.git) registered for path 'src/libcompiler_builtins'
---
[01:33:23] Verifying status of book...
[01:33:23] Verifying status of nomicon...
[01:33:23] This PR updated 'src/doc/nomicon', verifying if status is 'test-pass'...
[01:33:23] 
[01:33:23] ⚠️ We detected that this PR updated 'nomicon', but its tests failed.
[01:33:23] 
[01:33:23] If you do intend to update 'nomicon', please check the error messages above and
[01:33:23] commit another update.
[01:33:23] 
[01:33:23] If you do NOT intend to update 'nomicon', please ensure you did not accidentally
[01:33:23] change the submodule at 'src/doc/nomicon'. You may ask your reviewer for the
[01:33:23] proper steps.
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 3.
travis_time:start:266bdd60
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Fri Nov 30 19:23:08 UTC 2018
---
travis_time:end:29358201:start=1543605790330735574,finish=1543605790340684593,duration=9949019
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:21531e3a
$ 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:1396a0f6
travis_time:start:1396a0f6
$ 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:31f10550
$ 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)

[pietroalbini]

cc @gankro, nomicon's tests are failing

[alexcrichton]

@bors r+ p=100

[bors]

📌 Commit ce5d4db has been approved by alexcrichton

[bors]

⌛ Testing commit ce5d4db with merge d2e3b53...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: alexcrichton
Pushing d2e3b53 to beta...