Rollup of 5 pull requests

[Centril]

Successful merges:

• Use libunwind from llvm-project submodule for musl targets #63173 (Use libunwind from llvm-project submodule for musl targets)
• Add tests for some issues #63259 (Add tests for some issues)
• Update rustfmt to 1.4.4 #63316 (Update rustfmt to 1.4.4)
• Test conditional initialization validation in async fns #63331 (Test conditional initialization validation in async fns)
• Update to rustc-guide that passes toolstate #63334 (Update to rustc-guide that passes toolstate)

Failed merges:

r? @ghost

[Centril]

@bors r+ p=5 rollup=never

[bors]

📌 Commit 35380be has been approved by Centril

[bors]

⌛ Testing commit 35380be with merge ae515c8b660e20686ee0f8dc7c479fe89e3a621b...

[bors]

💔 Test failed - checks-azure

[rust-highfive]

The job dist-i586-gnu-i586-i686-musl of your PR failed (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.

2019-08-07T08:08:01.4293793Z do so (now or later) by using -b with the checkout command again. Example:
2019-08-07T08:08:01.4293846Z 
2019-08-07T08:08:01.4294112Z   git checkout -b <new-branch-name>
2019-08-07T08:08:01.4294159Z 
2019-08-07T08:08:01.4295782Z HEAD is now at ae515c8b6 Auto merge of #63345 - Centril:rollup-9ue8fz6, r=Centril
2019-08-07T08:08:01.4477302Z ##[section]Starting: Collect CPU-usage statistics in the background
2019-08-07T08:08:01.4480468Z ==============================================================================
2019-08-07T08:08:01.4480711Z Task         : Bash
2019-08-07T08:08:01.4480772Z Description  : Run a Bash script on macOS, Linux, or Windows
---
2019-08-07T08:11:31.1388449Z checking whether compiler accepts -fno-unwind-tables... yes
2019-08-07T08:11:31.1490415Z checking whether compiler accepts -fno-asynchronous-unwind-tables... yes
2019-08-07T08:11:31.1586060Z checking whether compiler accepts -ffunction-sections... yes
2019-08-07T08:11:31.1679018Z checking whether compiler accepts -fdata-sections... yes
2019-08-07T08:11:31.1712962Z checking whether linker accepts -march=i486... no
2019-08-07T08:11:31.1839394Z checking whether linker accepts -mtune=generic... yes
2019-08-07T08:11:31.2033296Z checking whether compiler accepts -Werror=implicit-int... yes
2019-08-07T08:11:31.2127886Z checking whether compiler accepts -Werror=pointer-sign... yes
2019-08-07T08:11:31.2230372Z checking whether compiler accepts -Werror=pointer-arith... yes
2019-08-07T08:11:31.2281760Z checking preprocessor condition __PIC__... true
---
2019-08-07T08:11:31.3958067Z checking preprocessor condition __FAST_MATH__... false
2019-08-07T08:11:31.4055903Z creating config.mak... done
2019-08-07T08:11:31.4067788Z + '[' i686 = i586 -o i686 = i686 ']'
2019-08-07T08:11:31.4072436Z ++ nproc
2019-08-07T08:11:31.4079764Z + hide_output make -j2 AR=ar RANLIB=ranlib
2019-08-07T08:11:50.1119850Z musl.sh: line 3:   174 Terminated              bash -c "while true; do sleep 30; echo \$(date) - building ...; done"
2019-08-07T08:11:50.1120068Z + hide_output make install
2019-08-07T08:11:50.1120163Z + set +x
2019-08-07T08:11:51.4915804Z musl.sh: line 3:  4305 Terminated              bash -c "while true; do sleep 30; echo \$(date) - building ...; done"
---
2019-08-07T08:11:51.8209216Z checking whether compiler accepts -fno-unwind-tables... yes
2019-08-07T08:11:51.8316234Z checking whether compiler accepts -fno-asynchronous-unwind-tables... yes
2019-08-07T08:11:51.8426289Z checking whether compiler accepts -ffunction-sections... yes
2019-08-07T08:11:51.8541046Z checking whether compiler accepts -fdata-sections... yes
2019-08-07T08:11:51.8664870Z checking whether linker accepts -mtune=generic... yes
2019-08-07T08:11:51.8855464Z checking whether compiler accepts -Werror=implicit-int... yes
2019-08-07T08:11:51.8960269Z checking whether compiler accepts -Werror=pointer-sign... yes
2019-08-07T08:11:51.9055811Z checking whether compiler accepts -Werror=pointer-arith... yes
2019-08-07T08:11:51.9109437Z checking preprocessor condition __PIC__... true
---
2019-08-07T08:11:52.0686802Z checking preprocessor condition __FAST_MATH__... false
2019-08-07T08:11:52.0787688Z creating config.mak... done
2019-08-07T08:11:52.0798619Z + '[' i586 = i586 -o i586 = i686 ']'
2019-08-07T08:11:52.0828356Z ++ nproc
2019-08-07T08:11:52.0828625Z + hide_output make -j2 AR=ar RANLIB=ranlib
2019-08-07T08:12:10.6097550Z musl.sh: line 3:  5873 Terminated              bash -c "while true; do sleep 30; echo \$(date) - building ...; done"
2019-08-07T08:12:10.6099383Z + hide_output make install
2019-08-07T08:12:10.6099767Z + set +x
2019-08-07T08:12:11.9600177Z musl.sh: line 3: 10006 Terminated              bash -c "while true; do sleep 30; echo \$(date) - building ...; done"
---
2019-08-07T09:19:05.0001450Z test [ui] ui/async-await/await-keyword/post_expansion_error.rs ... ok
2019-08-07T09:19:05.0692047Z test [ui] ui/async-await/await-unsize.rs ... ok
2019-08-07T09:19:05.0715172Z test [ui] ui/async-await/await-keyword/incorrect-syntax-suggestions.rs ... ok
2019-08-07T09:19:05.1244389Z test [ui] ui/async-await/bound-normalization.rs ... ok
2019-08-07T09:19:05.1479339Z test [ui] ui/async-await/conditional-and-guaranteed-initialization.rs ... ok
2019-08-07T09:19:05.2655088Z test [ui] ui/async-await/dont-suggest-missing-await.rs ... ok
2019-08-07T09:19:08.0599148Z test [ui] ui/async-await/drop-order/drop-order-for-async-fn-parameters-by-ref-binding.rs ... ok
2019-08-07T09:19:08.2225200Z test [ui] ui/async-await/drop-order/drop-order-for-async-fn-parameters.rs ... ok
2019-08-07T09:19:09.0630039Z test [ui] ui/async-await/drop-order/drop-order-locals-are-hidden.rs ... ok
---
2019-08-07T09:31:26.2317594Z    Compiling libc v0.2.60
2019-08-07T09:31:26.2509078Z    Compiling compiler_builtins v0.1.18
2019-08-07T09:31:31.4941891Z    Compiling backtrace-sys v0.1.30
2019-08-07T09:31:33.3554962Z    Compiling unwind v0.0.0 (/checkout/src/libunwind)
2019-08-07T09:31:33.3555404Z error: failed to run custom build command for `unwind v0.0.0 (/checkout/src/libunwind)`
2019-08-07T09:31:33.3555915Z Caused by:
2019-08-07T09:31:33.3555915Z Caused by:
2019-08-07T09:31:33.3556485Z   process didn't exit successfully: `/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/release/build/unwind-a04f9435c6eb75e3/build-script-build` (exit code: 101)
2019-08-07T09:31:33.3556711Z --- stdout
2019-08-07T09:31:33.3556938Z cargo:rerun-if-changed=build.rs
2019-08-07T09:31:33.3557262Z cargo:rustc-link-search=native=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/i686-unknown-linux-musl/release/build/unwind-3b3aa3b1105b96b5/out
2019-08-07T09:31:33.3558000Z running: "musl-g++" "-O2" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m32" "-static" "-march=i686" "-Wl,-melf_i386" "-I" "../llvm-project/libunwind/include" "-std=c99" "-std=c++11" "-nostdinc++" "-fno-exceptions" "-fno-rtti" "-fstrict-aliasing" "-funwind-tables" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/i686-unknown-linux-musl/release/build/unwind-3b3aa3b1105b96b5/out/../llvm-project/libunwind/src/Unwind-EHABI.o" "-c" "../llvm-project/libunwind/src/Unwind-EHABI.cpp"
2019-08-07T09:31:33.3558842Z --- stderr
2019-08-07T09:31:33.3559052Z thread 'main' panicked at '
2019-08-07T09:31:33.3559217Z 
2019-08-07T09:31:33.3559217Z 
2019-08-07T09:31:33.3559475Z Internal error occurred: Failed to find tool. Is `musl-g++` installed?
2019-08-07T09:31:33.3559806Z ', /cargo/registry/src/gh.neting.cc-1ecc6299db9ec823/cc-1.0.35/src/lib.rs:2398:5
2019-08-07T09:31:33.3559909Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
2019-08-07T09:31:33.3559955Z 
2019-08-07T09:31:33.3560216Z warning: build failed, waiting for other jobs to finish...
2019-08-07T09:31:33.3560216Z warning: build failed, waiting for other jobs to finish...
2019-08-07T09:31:55.3393280Z [RUSTC-TIMING] core test:false 29.108
2019-08-07T09:31:55.3457073Z error: build failed
2019-08-07T09:31:55.3480035Z command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "--target" "i686-unknown-linux-musl" "-j" "2" "--release" "--locked" "--color" "always" "--features" "panic-unwind backtrace compiler-builtins-c" "--manifest-path" "/checkout/src/libstd/Cargo.toml" "--message-format" "json"
2019-08-07T09:31:55.3490584Z expected success, got: exit code: 101
2019-08-07T09:31:55.3491089Z failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test --target i586-unknown-linux-gnu,i686-unknown-linux-musl
2019-08-07T09:31:55.3491180Z Build completed unsuccessfully in 1:16:31
2019-08-07T09:31:57.2078119Z ##[error]Bash exited with code '1'.
2019-08-07T09:31:57.2126489Z ##[section]Starting: Upload CPU usage statistics
2019-08-07T09:31:57.2138080Z ==============================================================================
2019-08-07T09:31:57.2138184Z Task         : Bash
2019-08-07T09:31:57.2138242Z Description  : Run a Bash script on macOS, Linux, or Windows

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