Files
rust/tests/ui
bors 8269be147b Auto merge of #129398 - matthiaskrgr:rollup-50l01ry, r=matthiaskrgr
Rollup of 8 pull requests

Successful merges:

 - #128432 (WASI: forbid `unsafe_op_in_unsafe_fn` for `std::{os, sys}`)
 - #129373 (Add missing module flags for CFI and KCFI sanitizers)
 - #129374 (Use `assert_unsafe_precondition!` in `AsciiChar::digit_unchecked`)
 - #129376 (Change `assert_unsafe_precondition` docs to refer to `check_language_ub`)
 - #129382 (Add `const_cell_into_inner` to `OnceCell`)
 - #129387 (Advise against removing the remaining Python scripts from `tests/run-make`)
 - #129388 (Do not rely on names to find lifetimes.)
 - #129395 (Pretty-print own args of existential projections (dyn-Trait w/ GAT constraints))

r? `@ghost`
`@rustbot` modify labels: rollup
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UI Tests

This folder contains rustc's UI tests.

Test Directives (Headers)

Typically, a UI test will have some test directives / headers which are special comments that tell compiletest how to build and intepret a test.

As part of an on-going effort to rewrite compiletest (see https://github.com/rust-lang/compiler-team/issues/536), a major change proposal to change legacy compiletest-style headers // <directive> to ui_test-style headers //@ <directive> was accepted (see https://github.com/rust-lang/compiler-team/issues/512.

An example directive is ignore-test. In legacy compiletest style, the header would be written as

// ignore-test

but in ui_test style, the header would be written as

//@ ignore-test

compiletest is changed to accept only //@ directives for UI tests (currently), and will reject and report an error if it encounters any comments // <content> that may be parsed as an legacy compiletest-style test header. To fix this, you should migrate to the ui_test-style header //@ <content>.