Files
rust/tests/ui
Chris Denton 546367ef69 Rollup merge of #139607 - reddevilmidzy:add-regression-test, r=petrochenkov
Add regression test for #127424

Fixes: https://github.com/rust-lang/rust/issues/127424

This ICE no longer reproduces, so it appears to have already been fixed.
This PR adds a regression test to ensure the issue doesn’t come back in the future.

Please let me know if there's anything I should improve or revise!
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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>.