The `thread_local!` macro delegated to an internal macro but it didn't
do so in a macros-and-the-module-system compatible fashion, meaning if a
`#![no_std]` crate imported `std` and tried to use `thread_local!` it
would fail due to missing a lookup of an internal macro.

This commit switches the macro to instead use `$crate` to invoke other
macros, ensuring that it'll work when `thread_local!` is imported alone.

It was superseded by `#[panic_handler]`

…sages

Specifically no capitalisation or trailing full stops.

This commit adjusts the indentation of code within a documentation
comment so that it is correctly highlighted as code by rustdoc.

In each of the three cases in this test, there is a mutable borrow
of some field of the union and then a shared borrow of some other field
immediately following.

Under NLL, the mutable borrow is killed straight away as it isn't
used later - therefore not causing a conflict with the shared borrow.
This commit adds a use of the first mutable borrow to force the intended
errors to appear under NLL.

Add test for incompleately implemented add trait, see issue rust-lang#31076

self.associated_item can return none, replace unwrap with '?' and bubble up None value instead of panicking

Most of the time we want to robustify tests, but in this case this
test is deliberately encoding artifacts of AST-borrowck.  So instead
of adding artificial uses that would obscure the aspects of
AST-borrowck that are being tests, we instead use revisions and then
mark the cases that apply to NLL as well as AST-borrowck.

…r.t. NLL.

….t. NLL.

This is not strictly necessary to make this test "more robust with
respect to NLL"; its just an attempt to narrow the scope of the test
and focus on its core.

This is based on the feedback from estebank:

"""
I believe that test can be removed outright. It'd be impossible for a
new change to go through that breaks this kind of output without it
being picked up by multiple other `stderr` tests. This is an artifact
of the transition period to the "new" output style.
"""

see: rust-lang#52663 (comment)

This is a variant of `ui/borrowck/borrowck-closures-mut-of-imm.rs`
that I used to help identify what changes I needed to make to the
latter file in order to recover its instances of E0524 under NLL.

(Basically this test includes the changes you'd need to make to
`ui/borrowck/borrowck-closures-mut-of-imm.rs` in order to get rid of
occurrences of E0596. And then I realized that one needs to add
invocations of the closures in order to properly extend the mutable
reborrows in a manner such that NLL will roughly match AST-borrowck.)

… compare-mode=nll.

NLL has increased precision in its analysis of drop order, and we want
the test annotations to deliberately reflect this by having fewer
ERROR annotations for NLL than for AST-borrowck. The best way to get
this effect is via `// revisions`.

As a drive-by, also added uses of all the borrows just to make it
clear that NLL isn't somehow sidestepping things by using shorter
borrows than you might have otherwise expected. (Of course, the added
uses do not make all that much difference since the relevant types all
declare `impl Drop` and thus those drops have implicit uses anyway.)

add call to tcx.sess.delay_span_bug before returning none to make sure error is presented to user

…ble NLL.

resolve: Fix ICE in macro import error recovery

Fixes rust-lang#55457

…KodrAus

std: Enable usage of `thread_local!` through imports

The `thread_local!` macro delegated to an internal macro but it didn't
do so in a macros-and-the-module-system compatible fashion, meaning if a
`#![no_std]` crate imported `std` and tried to use `thread_local!` it
would fail due to missing a lookup of an internal macro.

This commit switches the macro to instead use `$crate` to invoke other
macros, ensuring that it'll work when `thread_local!` is imported alone.

Fix tracking issue numbers for some unstable features

And also remove deprecated unstable `#[panic_implementation]` attribute that was superseded by stable `#[panic_handler]` and doesn't have an open tracking issue.

…isdreavus

Add precision for create_dir function

Took me a while to find the other equivalent so it seems to be necessary.

r? @QuietMisdreavus

…ichton

ci: Add Dockerfile for dist-powerpcspe-linux

This adds the Dockerfile for cross-building Rust for the powerpcspe target. It's currently disabled.

…r=zackmdavis

Make "all possible cases" help message uniform with existing help messages

Specifically no capitalisation or trailing full stops.

miri: binary_op_val -> binary_op_imm

Seems like this was overlooked during the value -> immediate rename.

r? @oli-obk

Fixes rust-lang#31076

NLL Diagnostic Review 3: Missing errors for borrows of union fields

Fixes rust-lang#55675.

This PR modifies a test to make it more robust (it also fixes indentation on a doc comment, but that's not the point of the PR). See the linked issue for details.

r? @pnkfelix

…s-wrt-nll, r=davidtwco

Update ui tests with respect to NLL

Fix rust-lang#55533

…eflect-pr-54811, r=Mark-Simulacrum

Update `configure --help` (via configure.py) to reflect decoupling of debug+optimize

This should have been part of PR rust-lang#54811 (my bad).