Rollup of 32 pull requests

[kennytm]

Successful merges:

• [std] Osstr lossy example #56142 ([std] Osstr lossy example)
• Add lint for items deprecated in future #56203 (Add lint for items deprecated in future)
• Remove not used mod #56343 (Remove not used mod)
• Stabilize linker-flavor flag. #56351 (Stabilize linker-flavor flag.)
• Clearer error message for dead assign #56439 (Clearer error message for dead assign)
• polonius tweaks #56507 (polonius tweaks)
• Update libc version required by rustc #56562 (Update libc version required by rustc)
• bootstrap: fix edition #56600 (bootstrap: fix edition)
• Unconditionally emit the target-cpu LLVM attribute. #56609 (Unconditionally emit the target-cpu LLVM attribute.)
• rustdoc: Fix local reexports of proc macros #56637 (rustdoc: Fix local reexports of proc macros)
• Add non-panicking maybe_new_parser_from_file variant #56658 (Add non-panicking maybe_new_parser_from_file variant)
• Document time of back operations of a Linked List #56672 (Document time of back operations of a Linked List)
• #[must_use] on traits in stdlib #56677 (#[must_use] on traits in stdlib)
• overhaul external doc attribute diagnostics #56679 (overhaul external doc attribute diagnostics)
• fix install broken link #56691 (fix install broken link)
• Fix irrefutable matches on integer ranges #56695 (Fix irrefutable matches on integer ranges)
• Use a newtype_index! within Symbol. #56699 (Use a newtype_index! within Symbol.)
• [self-profiler] Add column for percent of total time #56702 ([self-profiler] Add column for percent of total time)
• Remove some unnecessary feature gates #56708 (Remove some unnecessary feature gates)
• Always set the RDRAND and RDSEED features on SGX #56710 (Always set the RDRAND and RDSEED features on SGX)
• Test capacity of ZST vector #56713 (Test capacity of ZST vector)
• Use libbacktrace pretty-printing #56718 (Use libbacktrace pretty-printing)
• fix rust-lang/rust issue #50583 #56725 (fix rust-lang/rust issue Getting a Illegal instruction segfault on arm (Raspberry Pi 1) #50583)
• Add missing urls in ffi module docs #56731 (Add missing urls in ffi module docs)
• Fix private_no_mangle_fns message grammar #56738 (Fix private_no_mangle_fns message grammar)
• infer: remove Box from a returned Iterator #56742 (infer: remove Box from a returned Iterator)
• Add test of current behavior (infer free region within closure body) #56746 (Add test of current behavior (infer free region within closure body))
• target: remove Box returned by get_targets #56747 (target: remove Box returned by get_targets)
• x86: Add the adx target feature to whitelist #56749 (x86: Add the adx target feature to whitelist)
• Account for impl Trait when suggesting lifetime #56755 (Account for impl Trait when suggesting lifetime)
• Disable btree pretty-printers on older gdbs #56756 (Disable btree pretty-printers on older gdbs)
• Add short emoji status to toolstate updates #56758 (Add short emoji status to toolstate updates)

[kennytm]

@bors r+

Added #56351, #56758.

[bors]

📌 Commit 8caa657 has been approved by kennytm

[kennytm]

@bors r+

Added #56783, #56490

[bors]

📌 Commit d05956190581cdf14dca91eb2f56821695b06215 has been approved by kennytm

[bors]

⌛ Testing commit d05956190581cdf14dca91eb2f56821695b06215 with merge 2353402c413985843641c4e23df6b0310b6d8a52...

[bors]

💔 Test failed - status-travis

[kennytm]

@bors r+

Removed #56783 (already testing)
Removed #56490 (causing the error above)

[bors]

📌 Commit 8caa657 has been approved by kennytm

[bors]

⌛ Testing commit 8caa657 with merge ab187f7479c89404d9d6a44a5cb88eb3c21ac797...

[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.

[01:24:39]                                                         ^^^^^^^^^^^^
[01:24:39]     = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[01:24:39] 
[01:24:40]  Documenting arena v0.0.0 (/checkout/src/libarena)
[01:24:41] thread '<unnamed>' panicked at 'assertion failed: output.is_none()', src/librustdoc/clean/simplify.rs:108:21
[01:24:41] 
[01:24:41] error: internal compiler error: unexpected panic
[01:24:41] 
[01:24:41] error: Unrecognized option: 'document-private-items'
[01:24:41] error: Unrecognized option: 'document-private-items'
[01:24:41] 
[01:24:41] error: Could not document `rustc_codegen_llvm`.
[01:24:41] 
[01:24:41] Caused by:
[01:24:41]   process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustdoc --crate-name rustc_codegen_llvm src/librustc_codegen_llvm/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 cc=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libcc-c6f14bfbea71a5d2.rmeta --extern memmap=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libmemmap-f1ce0e7d8602fc1f.rmeta --extern num_cpus=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libnum_cpus-2f51f01ec1efde74.rmeta --extern rustc_demangle=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_demangle-d7f65c515e37a89e.rmeta --extern rustc_llvm=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_llvm-98200b85279ce65f.rmeta --document-private-items` (exit code: 1)
[01:24:42] [RUSTC-TIMING] rustc_target test:false 4.272
[01:24:44] error: build failed
[01:24:44] 
[01:24:44] 
[01:24:44] 
[01:24:44] 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" "-p" "rustc_codegen_ssa" "-p" "syntax_pos" "-p" "rustc_apfloat" "-p" "rustc_mir" "-p" "graphviz" "-p" "serialize" "-p" "rustc_typeck" "-p" "rustc_errors" "-p" "rustc_plugin" "-p" "fmt_macros" "-p" "rustc_fs_util" "-p" "rustc_save_analysis" "-p" "rustc_target" "-p" "rustc_driver" "-p" "syntax_ext" "-p" "rustc_llvm" "-p" "rustc_data_structures" "-p" "rustc_allocator" "-p" "rustc_privacy" "-p" "rustc_borrowck" "-p" "syntax" "-p" "rustc_platform_intrinsics" "-p" "arena" "-p" "rustc_resolve" "-p" "rustc_passes" "-p" "rustc_codegen_llvm" "-p" "rustc_incremental" "-p" "rustc_metadata" "-p" "rustc_codegen_utils" "-p" "rustc_lint" "-p" "build_helper" "-p" "rustc_traits"
[01:24:44] 
[01:24:44] 
[01:24:44] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap dist --host x86_64-unknown-linux-gnu --target x86_64-unknown-linux-gnu
[01:24:44] Build completed unsuccessfully in 1:19:46
---
travis_time:end:033626c3:start=1544737670285052753,finish=1544737670291532419,duration=6479666
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:0059858a
$ 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:086109e2
travis_time:start:086109e2
$ 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:15736908
$ dmesg | grep -i kill

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[bors]

☔ The latest upstream changes (presumably #56351) made this pull request unmergeable. Please resolve the merge conflicts.