This reflects the concensus from the libs team as reported at
rust-lang#70887 (comment)

Co-authored-by: Yosh Wuyts <[email protected]>

…a stack)

Signed-off-by: Vincenzo Palazzo <[email protected]>

Stabilize backtrace

This PR stabilizes the std::backtrace module. As of rust-lang#99431, the std::Error::backtrace item has been removed, and so the rest of the backtrace feature is set to be stabilized.

Previous discussion can be found in rust-lang#72981, rust-lang#3156.

Stabilized API summary:
```rust
pub mod std {
    pub mod backtrace {
        pub struct Backtrace { }
        pub enum BacktraceStatus {
            Unsupported,
            Disabled,
            Captured,
        }
        impl fmt::Debug for Backtrace {}
        impl Backtrace {
            pub fn capture() -> Backtrace;
            pub fn force_capture() -> Backtrace;
            pub const fn disabled() -> Backtrace;
            pub fn status(&self) -> BacktraceStatus;
        }
        impl fmt::Display for Backtrace {}
    }
}
```

`@yaahc`

…oerister

Add error if link_ordinal used with unsupported link kind

The `link_ordinal` attribute only has an affect if the `raw-dylib` link kind is used, so add an error if it is used with any other link kind.

…eiser

Add more `// unit-test`s to MIR opt tests

I only changed things which are hopefully completely uninteresting. I plan to submit more PRs that cover more files, but those cases will need some more complicated (and hence possibly controversial) changes, so I'll try and submit those in reasonably sized batches.

r? rust-lang/wg-mir-opt

Rename integer log* methods to ilog*

This reflects the concensus from the libs team as reported at rust-lang#70887 (comment).

Joint work with `@yoshuawuyts.`

…before-array, r=fee1-dead

Suggest a missing semicolon before an array

fixes rust-lang#99658

…errors

Iterate generics_def_id_map in reverse order to fix P-critical issue

Closes rust-lang#100187

Fixes a `P-critical` beta regression.

…oc, r=joshtriplett

docs: remove repetition in `is_numeric` function docs

In rust-lang#99628 we introduce new docs for the `is_numeric` function, and this is a follow-up PR that removes some unnecessary repetition that may be introduced by some rebasing.

`@rustbot` r? `@joshtriplett`

Update cargo

7 commits in 4fd148c47e733770c537efac5220744945d572ef..ce40690a5e4e315d3dab0aae1eae69d0252c52ac
2022-08-03 15:03:52 +0000 to 2022-08-09 22:32:17 +0000
- Make the `rust-version` error recommend `cargo update --precise -p crate@ver` (rust-lang/cargo#10891)
- resolver docs: link to version requirements syntax full explanation (rust-lang/cargo#10946)
- Bump os_info to 3.5.0 (rust-lang/cargo#10943)
- Mark --timings=html unstable in the document (rust-lang/cargo#10941)
- Mention that aliases are recursive (rust-lang/cargo#10935)
- Test if reserved filenames are allowed in Windows (rust-lang/cargo#10322)
- improve error message for `no such subcommand` (rust-lang/cargo#10924)