Rollup of 12 pull requests

[JohnTitor]

Successful merges:

• Support pretty printing slices using GDB #85363 (Support pretty printing slices using GDB)
• doc: clarify Mutex::try_lock, etc. errors #85529 (doc: clarify Mutex::try_lock, etc. errors)
• Fix bootstrap using host exe suffix for cargo #85590 (Fix bootstrap using host exe suffix for cargo)
• Fix pointer provenance in <[T]>::copy_within #85610 (Fix pointer provenance in <[T]>::copy_within)
• Remove stray .stderr files #85623 (Remove stray .stderr files)
• Demote ControlFlow::{from|into}_try to pub(crate) #85645 (Demote ControlFlow::{from|into}_try to pub(crate))
• Revert "Move llvm submodule updates to rustbuild" #85647 (Revert "Move llvm submodule updates to rustbuild")
• Document shared_from_cow functions #85666 (Document shared_from_cow functions)
• Fix tasklist example in rustdoc book. #85668 (Fix tasklist example in rustdoc book.)
• Move stability attribute for items under the ip feature #85672 (Move stability attribute for items under the ip feature)
• Update books #85699 (Update books)
• Update cargo #85701 (Update cargo)

Failed merges:

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

[JohnTitor]

@bors r+ p=12 rollup=never

[bors]

📌 Commit 6582cf5 has been approved by JohnTitor

[bors]

⌛ Testing commit 6582cf5 with merge 9eb65896a8f56d59362415613305bd9f588b49b4...

[rust-log-analyzer]

The job dist-i586-gnu-i586-i686-musl failed! Check out the build log: (web) (plain)

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

test [debuginfo-gdb] debuginfo/cross-crate-type-uniquing.rs ... ok

failures:

---- [debuginfo-gdb] debuginfo/pretty-slices.rs stdout ----
NOTE: compiletest thinks it is using GDB without native rust support
NOTE: compiletest thinks it is using GDB version 7011001

error: line not found in debugger output:  $1 = &[i32](size=3) = {0, 1, 2}
status: exit status: 0
command: "/usr/bin/gdb" "-quiet" "-batch" "-nx" "-command=/checkout/obj/build/x86_64-unknown-linux-gnu/test/debuginfo/pretty-slices.gdb/pretty-slices.debugger.script"
------------------------------------------
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http:https://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http:https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http:https://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".
Breakpoint 1 at 0x1b0d: file /checkout/src/test/debuginfo/pretty-slices.rs, line 42.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Breakpoint 1, pretty_slices::main::h2580ea4221c8f0c6 () at /checkout/src/test/debuginfo/pretty-slices.rs:42
42     b(); // #break
$1 = struct &[i32](size=3) = {0, 1, 2}
$2 = struct &mut [i32](size=4) = {2, 3, 5, 7}
$3 = "string slice"
$4 = "mutable string slice"
A debugging session is active.

 Inferior 1 [process 2172] will be killed.

Quit anyway? (y or n) [answered Y; input not from terminal]
------------------------------------------
stderr:
------------------------------------------

---
test result: FAILED. 71 passed; 1 failed; 45 ignored; 0 measured; 0 filtered out; finished in 5.13s



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/i586-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/debuginfo" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/debuginfo" "--stage-id" "stage2-i586-unknown-linux-gnu" "--suite" "debuginfo" "--mode" "debuginfo" "--target" "i586-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/checkout/obj/build/x86_64-unknown-linux-gnu/llvm/build/bin/FileCheck" "--linker" "cc" "--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/i586-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python3" "--lldb-python" "/usr/bin/python3" "--gdb" "/usr/bin/gdb" "--llvm-version" "12.0.1-rust-1.54.0-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 i586-unknown-linux-gnu,i686-unknown-linux-musl
Build completed unsuccessfully in 0:24:05

[bors]

💔 Test failed - checks-actions