The way octal literals are written in IP addresses differs from the way
they are written in Rust code, so the way that octal/hex literals in IPs
are written is explictly mentioned.

Now that there can't be a bunch of leading zeros, parsing can be
optimized a bit.

Co-authored-by: Cheng XU <[email protected]>

I'm working on some LLVM patches in concert with a Rust patch, and it's
helping me quite a bit to have this as an option. It doesn't seem that
hard, so I figured I'd formalize it in x.py and send it upstream.

…e commands)

use array explicitly instead of vec for const content (even if optimizer smart enought to remove allocation)

…zer smart enought to remove allocation)

…d on foreign trait implementations

Reject octal zeros in IPv4 addresses

This fixes rust-lang#86964 by rejecting octal zeros in IP addresses, such that `192.168.00.00000000` is rejected with a parse error, since having leading zeros in front of another zero indicates it is a zero written in octal notation, which is not allowed in the strict mode specified by RFC 6943 3.1.1. Octal rejection was implemented in rust-lang#83652, but due to the way it was implemented octal zeros were still allowed.

…in_overflow, r=m-ou-se

Avoid overflow in `VecDeque::with_capacity_in()`.

The overflow only happens if alloc is compiled with overflow checks enabled and the passed capacity is greater or equal 2^(usize::BITS-1). The overflow shadows the expected "capacity overflow" panic leading to a test failure if overflow checks are enabled for std in the CI.

Unblocks [CI: Enable overflow checks for test (non-dist) builds rust-lang#89776](rust-lang#89776).

For some reason the overflow is only observable with optimization turned off, but that is a separate issue.

…mulacrum

config: add the option to enable LLVM tests

I'm working on some LLVM patches in concert with a Rust patch, and it's
helping me quite a bit to have this as an option. It doesn't seem that
hard, so I figured I'd formalize it in x.py and send it upstream.

… r=jsha

Add test for line-number setting

The first commit updates the version of the package to be able to have multi-line commands (which looks much nicer for this test).

r? ``@jsha``

Remove hir::map::blocks and use FnKind instead

The principal tool is `FnLikeNode`, which is not often used and can be easily implemented using `rustc_hir::intravisit::FnKind`.

2229 migrations small cleanup

This removes needless `format!`'ing of empty string and replaces `vec!` with const strings with const array.

…ntry-reexported-macro, r=notriddle

Add test for duplicated sidebar entries for reexported macro

Fixes rust-lang#90015.

r? ``@notriddle``

…l-missing-doc-code-examples, r=jyn514

Add test to ensure that the missing_doc_code_examples is not triggered on foreign trait implementations

Fixes rust-lang#76450.

r? ``@jyn514``

…olnay

Fix MIRI UB in `Vec::swap_remove`

Fixes rust-lang#90055

I find it weird that `Vec::swap_remove` read the last element to the stack just to immediately put it back in the `Vec` in place of the one at index `index`. It seems much more natural to me to just read the element at position `index` and then move the last element in its place. I guess this might also slightly improve codegen.