Rollup of 5 pull requests

[Dylan-DPC-zz]

Successful merges:

• Update RELEASES.md #83438 (Update RELEASES.md)
• Remove T: Debug bound on UnsafeCell Debug impl #83707 (Remove T: Debug bound on UnsafeCell Debug impl)
• Stabilize nonzero_leading_trailing_zeros #84082 (Stabilize nonzero_leading_trailing_zeros)
• Stabilize duration_zero. #84084 (Stabilize duration_zero.)
• Check for asm support in UI tests that require it #84099 (Check for asm support in UI tests that require it)

Failed merges:

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

[Dylan-DPC-zz]

@bors r+ rollup=never

[bors]

📌 Commit c2c6896 has been approved by Dylan-DPC

[bors]

⌛ Testing commit c2c6896 with merge 7ed6dec0195ed7ae7715bba857b0d35365a4b8a7...

[rust-log-analyzer]

The job test-various failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

---- [ui] ui/asm/bad-options.rs stdout ----
diff of stderr:

28 LL |         asm!("{}", out(reg) foo, options(noreturn));
30 
- error: aborting due to 5 previous errors
- error: aborting due to 5 previous errors
+ error: invalid register class `reg`: unknown register class
+    |
+    |
+ LL |         asm!("{}", in(reg) foo, options(pure, nomem));
+ 
+ error: aborting due to 6 previous errors
32 
33 
33 


The actual stderr differed from the expected stderr.
Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/asm/bad-options/bad-options.stderr
To update references, rerun the tests and pass the `--bless` flag
To only update this specific test, also pass `--test-args asm/bad-options.rs`
error: 1 errors occurred comparing output.
status: exit status: 1
status: exit status: 1
command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/asm/bad-options.rs" "-Zthreads=1" "--target=wasm32-unknown-unknown" "--error-format" "json" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zemit-future-incompat-report" "--emit" "metadata" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/asm/bad-options" "-A" "unused" "-Crpath" "-O" "-Cdebuginfo=0" "-Zunstable-options" "-Lnative=/checkout/obj/build/wasm32-unknown-unknown/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/asm/bad-options/auxiliary"
------------------------------------------

------------------------------------------
stderr:
stderr:
------------------------------------------
error: the `nomem` and `readonly` options are mutually exclusive
   |
   |
LL |         asm!("", options(nomem, readonly));


error: the `pure` and `noreturn` options are mutually exclusive
   |
   |
LL |         asm!("", options(pure, nomem, noreturn));


error: asm with `pure` option must have at least one output
   |
   |
LL |         asm!("", options(pure, nomem, noreturn));


error: asm with `pure` option must have at least one output
   |
   |
LL |         asm!("{}", in(reg) foo, options(pure, nomem));


error: asm outputs are not allowed with the `noreturn` option
   |
   |
LL |         asm!("{}", out(reg) foo, options(noreturn));


error: invalid register class `reg`: unknown register class
   |
   |
LL |         asm!("{}", in(reg) foo, options(pure, nomem));

error: aborting due to 6 previous errors


---

Some tests failed in compiletest suite=ui mode=ui host=x86_64-unknown-linux-gnu target=wasm32-unknown-unknown


command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/wasm32-unknown-unknown/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--stage-id" "stage2-wasm32-unknown-unknown" "--suite" "ui" "--mode" "ui" "--target" "wasm32-unknown-unknown" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/checkout/obj/build/x86_64-unknown-linux-gnu/llvm/build/bin/FileCheck" "--nodejs" "/node-v15.14.0-linux-x64/bin/node" "--host-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options  -Lnative=/checkout/obj/build/wasm32-unknown-unknown/native/rust-test-helpers" "--docck-python" "/usr/bin/python3" "--lldb-python" "/usr/bin/python3" "--gdb" "/usr/bin/gdb" "--llvm-version" "12.0.0-rust-1.53.0-nightly" "--llvm-components" "aarch64 aarch64asmparser aarch64codegen aarch64desc aarch64disassembler aarch64info aarch64utils aggressiveinstcombine all all-targets analysis arm armasmparser armcodegen armdesc armdisassembler arminfo armutils asmparser asmprinter avr avrasmparser avrcodegen avrdesc avrdisassembler avrinfo binaryformat bitreader bitstreamreader bitwriter cfguard codegen core coroutines coverage debuginfocodeview debuginfodwarf debuginfogsym debuginfomsf debuginfopdb demangle dlltooldriver dwarflinker engine executionengine extensions filecheck frontendopenacc frontendopenmp fuzzmutate globalisel hellonew hexagon hexagonasmparser hexagoncodegen hexagondesc hexagondisassembler hexagoninfo instcombine instrumentation interfacestub interpreter ipo irreader jitlink libdriver lineeditor linker lto mc mca mcdisassembler mcjit mcparser mips mipsasmparser mipscodegen mipsdesc mipsdisassembler mipsinfo mirparser msp430 msp430asmparser msp430codegen msp430desc msp430disassembler msp430info native nativecodegen nvptx nvptxcodegen nvptxdesc nvptxinfo objcarcopts object objectyaml option orcjit orcshared orctargetprocess passes powerpc powerpcasmparser powerpccodegen powerpcdesc powerpcdisassembler powerpcinfo profiledata remarks riscv riscvasmparser riscvcodegen riscvdesc riscvdisassembler riscvinfo runtimedyld scalaropts selectiondag sparc sparcasmparser sparccodegen sparcdesc sparcdisassembler sparcinfo support symbolize systemz systemzasmparser systemzcodegen systemzdesc systemzdisassembler systemzinfo tablegen target textapi transformutils vectorize webassembly webassemblyasmparser webassemblycodegen webassemblydesc webassemblydisassembler webassemblyinfo windowsmanifest x86 x86asmparser x86codegen x86desc x86disassembler x86info xray" "--cc" "" "--cxx" "" "--cflags" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"


failed to run: /checkout/obj/build/bootstrap/debug/bootstrap --stage 2 test --host= --target wasm32-unknown-unknown src/test/run-make src/test/ui src/test/mir-opt src/test/codegen-units library/core
Build completed unsuccessfully in 0:20:57

[bors]

💔 Test failed - checks-actions