Check rustdoc-json-types FORMAT_VERSION is correctly updated
Follow-up of https://github.com/rust-lang/rust/pull/142677.
``@nnethercote`` suggested that we should also ensure that the `FORMAT_VERSION` was only increased by 1 and we should check for it, this PR does it.
cc ``@aDotInTheVoid``
r? ghost
Document subdirectories of UI tests with README files
Part of rust-lang/rust#133895 and the [2025 Google Summer of Code](https://blog.rust-lang.org/2025/05/08/gsoc-2025-selected-projects/) associated project.
When adding a new UI test, one is faced with hundreds of subdirectories in `tests/ui` reflecting various categories. Knowing where to put the new test is not trivial, as many of the categories have slightly misleading names. For example, `moves` does not only refer to the `move` keyword but to functions taking ownership in general, whereas `allocator` does not refer to allocation in general but rather to the very specific `allocator_api` and `global_allocator` features.
Many contributors will therefore place their test at the top level of ̀`tests/ui` where it will be mixed with hundreds of unrelated tests.
This PR is a tentative move towards more clearly defined tag/categories, with a SUMMARY.md file documenting the true purpose of each subdirectory, placed inside `tests/ui`.
r? ``@jieyouxu``
All HIR attributes are outer
Fixes https://github.com/rust-lang/rust/issues/142649. Closes https://github.com/rust-lang/rust/pull/142759.
All HIR attributes, including parsed and not yet parsed, will now be rendered as outer attributes by `rustc_hir_pretty`. The original style of the corresponding AST attribute(s) is not relevant for pretty printing, only for diagnostics.
r? ````@jdonszelmann````
rustdoc_json: conversion cleanups
A bunch of clean-to-types conversion cleanups I found while working on perf-related stuff in rustdoc_json.
r? ```@aDotInTheVoid```
Pass -Cpanic=abort for the panic_abort crate
The panic_abort crate must be compiled with panic=abort, but cargo doesn't allow setting the panic strategy for a single crate the usual way using `panic="abort"`, but luckily per-package rustflags do allow this. Bootstrap previously handled this in its rustc wrapper, but for example the build systems of cg_clif and cg_gcc don't use the rustc wrapper, so they would either need to add one, patch the standard library or be unable to build a sysroot suitable for both panic=abort and panic=unwind (as is currently the case).
Required for https://github.com/rust-lang/rustc_codegen_cranelift/issues/1567
