Rollup of 19 pull requests

[GuillaumeGomez]

Successful merges:

• Document From implementations #51753 (Document From implementations)
• Improve no result found sentence in doc search #55563 (Improve no result found sentence in doc search)
• Add Weak.ptr_eq #55987 (Add Weak.ptr_eq)
• fix intra-link resolution spans in block comments #56010 (fix intra-link resolution spans in block comments)
• Utilize ? instead of return None. #56119 (Utilize ? instead of return None.)
• Introduce ptr::hash for references #56250 (Introduce ptr::hash for references)
• [rustdoc] Specific crate search #56332 ([rustdoc] Specific crate search)
• Refer to the second borrow as the "second borrow" in E0501.rs #56372 (Refer to the second borrow as the "second borrow" in E0501.rs)
• More MIR borrow check cleanup #56388 (More MIR borrow check cleanup)
• Mention raw-ident syntax #56424 (Mention raw-ident syntax)
• rustbuild: Fix issues with compiler docs #56441 (rustbuild: Fix issues with compiler docs)
• Remove redundant clones #56452 (Remove redundant clones)
• Handle existential types in dead code analysis #56456 (Handle existential types in dead code analysis)
• data_structures: remove tuple_slice #56466 (data_structures: remove tuple_slice)
• Fix invalid line number match #56476 (Fix invalid line number match)
• cleanup: remove static lifetimes from consts in libstd #56497 (cleanup: remove static lifetimes from consts in libstd)
• Fix line numbers display #56498 (Fix line numbers display)
• Added a bare-bones eslint config (removing jslint) #56523 (Added a bare-bones eslint config (removing jslint))
• Avoid extra copy and syscall in std::env::current_exe #56525 (Avoid extra copy and syscall in std::env::current_exe)

[kennytm]

@bors r=GuillaumeGomez

Added #55933, #56250, #56441, #56525.

[bors]

📌 Commit 77db179a2a73c5a2cc097e986442dd84ea43a37f has been approved by GuillaumeGomez

[bors]

⌛ Testing commit 77db179a2a73c5a2cc097e986442dd84ea43a37f with merge a2a47995defbe446dc85381fb5fae9d9ca184f29...

[bors]

💔 Test failed - status-appveyor

[kennytm]

@bors r=GuillaumeGomez

Removed #55933 (causing failure above)
Added #56010.

[bors]

📌 Commit f0fbfe2 has been approved by GuillaumeGomez

[bors]

⌛ Testing commit f0fbfe2 with merge 2821765995361088ebf2e87cd2d34f54bc0d1c65...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job dist-x86_64-linux 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.

[01:30:54] 
[01:30:54] error: Could not document `rustc_mir`.
[01:30:54] 
[01:30:54] Caused by:
[01:30:54]   process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustdoc --crate-name rustc_mir src/librustc_mir/lib.rs --color always --target x86_64-unknown-linux-gnu -o /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/doc -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/release/deps --extern arena=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libarena-b82b065d803ba059.rmeta --extern bitflags=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libbitflags-295e5ae5e71d1639.rmeta --extern byteorder=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libbyteorder-152a8cf6f1a33e2b.rmeta --extern either=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libeither-2de610a4f3267a39.rmeta --extern graphviz=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libgraphviz-20e044368fa7145d.rmeta --extern log=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/liblog-59b02de3b36a70e9.rmeta --extern log_settings=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/liblog_settings-7c8b0529b1428b32.rmeta --extern polonius_engine=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libpolonius_engine-417751586b0fd078.rmeta --extern rustc=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc-80bf13e3a564cda2.rmeta --extern rustc_apfloat=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_apfloat-c7c0526e5f7aba39.rmeta --extern rustc_data_structures=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_data_structures-6d02415bd0aa2a1d.rmeta --extern rustc_errors=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_errors-c2ec1cd1ce56af47.rmeta --extern rustc_target=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_target-087c5c29b2b1d529.rmeta --extern serialize=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libserialize-842d6678f47fdbed.rmeta --extern smallvec=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsmallvec-330e25a268d4cfb5.rmeta --extern syntax=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsyntax-31ed2dad90fc1e74.rmeta --extern syntax_pos=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsyntax_pos-55f0802cdd0774d5.rmeta --document-private-items` (exit code: 1)
[01:30:54] warning: Backing out of syntax highlighting
[01:30:54]   |
[01:30:54]   = note: You probably did not intend to render this as a rust code-block
[01:30:54] 
---
[01:30:57] [RUSTC-TIMING] rustc_mir test:false 30.116
[01:30:57] error: build failed
[01:30:57] 
[01:30:57] 
[01:30:57] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "doc" "--target" "x86_64-unknown-linux-gnu" "-j" "4" "--release" "--locked" "--color" "always" "--features" "jemalloc" "--manifest-path" "/checkout/src/rustc/Cargo.toml" "--no-deps" "-p" "rustc_save_analysis" "-p" "syntax" "-p" "rustc_llvm" "-p" "serialize" "-p" "syntax_pos" "-p" "rustc_codegen_utils" "-p" "rustc" "-p" "rustc_traits" "-p" "arena" "-p" "rustc_privacy" "-p" "rustc_codegen_ssa" "-p" "rustc_allocator" "-p" "rustc_lint" "-p" "rustc_mir" "-p" "rustc_errors" "-p" "rustc_incremental" "-p" "rustc_passes" "-p" "rustc_platform_intrinsics" "-p" "rustc_resolve" "-p" "syntax_ext" "-p" "rustc_typeck" "-p" "rustc_codegen_llvm" "-p" "rustc_apfloat" "-p" "build_helper" "-p" "rustc_plugin" "-p" "rustc_borrowck" "-p" "rustc_fs_util" "-p" "rustc_data_structures" "-p" "rustc_metadata" "-p" "rustc_driver" "-p" "fmt_macros" "-p" "rustc_target" "-p" "graphviz"
[01:30:57] 
[01:30:57] 
[01:30:57] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap dist --host x86_64-unknown-linux-gnu --target x86_64-unknown-linux-gnu
[01:30:57] Build completed unsuccessfully in 1:25:42
---
travis_time:end:1816aecb:start=1544032401672116524,finish=1544032401681992358,duration=9875834
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:0c840484
$ 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:0c5e5798
travis_time:start:0c5e5798
$ 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:03d15b30
$ dmesg | grep -i kill

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