Rollup of 13 pull requests

[Centril]

Successful merges:

• Use early unwraps instead of bubbling up errors just to unwrap in the end #58518 (Use early unwraps instead of bubbling up errors just to unwrap in the end)
• rustdoc: add option to calculate "documentation coverage" #58626 (rustdoc: add option to calculate "documentation coverage")
• rust-lldb: fix crash when printing empty string #58629 (rust-lldb: fix crash when printing empty string)
• MaybeUninit: add read_initialized, add examples #58660 (MaybeUninit: add read_initialized, add examples)
• fixes rust-lang#52482 #58670 (fixes Refactor away the TypeckTables::cast_kinds field #52482)
• look for python2 symlinks before bootstrap python #58676 (look for python2 symlinks before bootstrap python)
• Refactor passes and pass execution to be more parallel #58679 (Refactor passes and pass execution to be more parallel)
• Make Unique::as_ptr, NonNull::dangling and NonNull::cast const #58750 (Make Unique::as_ptr, NonNull::dangling and NonNull::cast const)
• Mention unwind(aborts) in diagnostics for #[unwind] #58762 (Mention unwind(aborts) in diagnostics for #[unwind])
• Add as_slice() to slice::IterMut and vec::Drain #58924 (Add as_slice() to slice::IterMut and vec::Drain)
• Actually publish miri in the manifest #58990 (Actually publish miri in the manifest)
• std: Delete a by-definition spuriously failing test #59018 (std: Delete a by-definition spuriously failing test)
• Expose new_sub_parser_from_file #59045 (Expose new_sub_parser_from_file)

Failed merges:

r? @ghost

[Centril]

@bors r+ p=13

[bors]

📌 Commit 4eb762a has been approved by Centril

[bors]

⌛ Testing commit 4eb762a with merge 7246b214d44ef56dfd213b3e3e2f13f61c7051f4...

[bors]

💔 Test failed - checks-travis

[rust-highfive]

The job arm-android 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.

[01:57:50] test string::test_str_clear ... ok
[01:57:50] test string::test_str_truncate ... ok
[01:57:50] test string::test_str_truncate_split_codepoint ... ok
[01:57:50] test string::test_str_truncate_invalid_len ... ok
[01:57:50] died due to signal 11
[01:57:50] 
[01:57:50] 
[01:57:50] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "test" "--target" "arm-linux-androideabi" "-j" "4" "--release" "--locked" "--color" "always" "--features" "panic-unwind backtrace" "--manifest-path" "/checkout/src/libstd/Cargo.toml" "-p" "alloc" "--"
[01:57:50] expected success, got: exit code: 3
---
travis_time:end:229bcbde:start=1552155515306833429,finish=1552155515316593672,duration=9760243
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:17b987be
$ 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:02b551fc
travis_time:start:02b551fc
$ 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:236dc66c
$ 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)

[Centril]

@bors retry

[bors]

⌛ Testing commit 4eb762a with merge 26b4cb4...

[bors]

☀️ Test successful - checks-travis, status-appveyor
Approved by: Centril
Pushing 26b4cb4 to master...