Rollup of 9 pull requests

[kennytm]

Successful merges:

• Use sort_by_cached_key when the key function is not trivial/free #55821 (Use sort_by_cached_key when the key function is not trivial/free)
• Enclose type in backticks for "non-exhaustive patterns" error #56114 (Enclose type in backticks for "non-exhaustive patterns" error)
• Update an outdated comment in mir building #56127 (Update an outdated comment in mir building)
• Fix ICE with feature self_struct_ctor #56205 (Fix ICE with feature self_struct_ctor)
• Add TryFrom<&[T]> for [T; $N] where T: Copy #56216 (Add TryFrom<&[T]> for [T; $N] where T: Copy)
• Make JSON output from -Zprofile-json valid #56223 (Make JSON output from -Zprofile-json valid)
• Update cargo, rls #56224 (Update cargo)
• Remove unsafe unsafe inner function. #56236 (Remove unsafe unsafe inner function.)
• Update outdated code comments in StringReader #56255 (Update outdated code comments in StringReader)

Failed merges:

r? @ghost

[kennytm]

@bors r+ p=9

[bors]

📌 Commit 76d7daa has been approved by kennytm

[bors]

⌛ Testing commit 76d7daa with merge 9ab9f4cdb928cadbc8845acb637ad6576ff4dc11...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job dist-mips-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.

[00:16:05] travis_fold:start:llvm
travis_time:start:llvm
Building LLVM for x86_64-unknown-linux-gnu
[00:16:05] running: "cmake" "/checkout/src/llvm" "-DLLVM_ENABLE_ASSERTIONS=OFF" "-DLLVM_TARGETS_TO_BUILD=X86;ARM;AArch64;Mips;PowerPC;SystemZ;MSP430;Sparc;NVPTX;Hexagon" "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly;RISCV" "-DLLVM_INCLUDE_EXAMPLES=OFF" "-DLLVM_INCLUDE_TESTS=OFF" "-DLLVM_INCLUDE_DOCS=OFF" "-DLLVM_INCLUDE_BENCHMARKS=OFF" "-DLLVM_ENABLE_ZLIB=OFF" "-DWITH_POLLY=OFF" "-DLLVM_ENABLE_TERMINFO=OFF" "-DLLVM_ENABLE_LIBEDIT=OFF" "-DLLVM_PARALLEL_COMPILE_JOBS=4" "-DLLVM_TARGET_ARCH=x86_64" "-DLLVM_DEFAULT_TARGET_TRIPLE=x86_64-unknown-linux-gnu" "-DLLVM_OCAML_INSTALL_PATH=usr/lib/ocaml" "-DLLVM_LINK_LLVM_DYLIB=ON" "-DLLVM_ENABLE_LIBXML2=OFF" "-DPYTHON_EXECUTABLE=/usr/bin/python2.7" "-DCMAKE_C_COMPILER=sccache" "-DCMAKE_C_COMPILER_ARG1=cc" "-DCMAKE_CXX_COMPILER=sccache" "-DCMAKE_CXX_COMPILER_ARG1=c++" "-DCMAKE_C_FLAGS=-ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_CXX_FLAGS=-ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_INSTALL_PREFIX=/checkout/obj/build/x86_64-unknown-linux-gnu/llvm" "-DCMAKE_BUILD_TYPE=Release"
[00:16:05] CMake Error: The source directory "/checkout/src/llvm" does not appear to contain CMakeLists.txt.
[00:16:05] Specify --help for usage, or press the help button on the CMake GUI.
[00:16:05] command did not execute successfully, got: exit code: 1
[00:16:05] 
[00:16:05] 
[00:16:05] build script failed, must exit now', /cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/cmake-0.1.33/src/lib.rs:773:5
[00:16:05]  finished in 0.015
[00:16:05] travis_fold:end:llvm

[00:16:05] travis_time:end:llvm:start=1543333966985294407,finish=1543333967000709605,duration=15415198
---
travis_time:end:0087b2e0:start=1543333967632064751,finish=1543333967642510918,duration=10446167
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:17d0a464
$ 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:1ac123d3
travis_time:start:1ac123d3
$ 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:02c2b34b
$ dmesg | grep -i kill

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