Files
rust/tests/ui
bors 8ad2c9724d Auto merge of #136728 - matthiaskrgr:rollup-x2qh9yt, r=matthiaskrgr
Rollup of 6 pull requests

Successful merges:

 - #136640 (Debuginfo for function ZSTs should have alignment of 8 bits, not 1 bit)
 - #136648 (Add a missing `//@ needs-symlink` to `tests/run-make/libs-through-symlinks`)
 - #136651 (Label mismatched parameters at the def site for foreign functions)
 - #136691 (Remove Linkage::Private and Linkage::Appending)
 - #136692 (add module level doc for bootstrap:utils:exec)
 - #136700 (i686-unknown-hurd-gnu: bump baseline CPU to Pentium 4)

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 interpret a test.

As part of an ongoing 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 a legacy compiletest-style test header. To fix this, you should migrate to the ui_test-style header //@ <content>.