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Document that rmake.rs/run-make-support may not use unstable features

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许杰友 Jieyou Xu (Joe) 2025-02-24 20:14:25 +08:00 • committed by Jieyou Xu
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src/doc/rustc-dev-guide/src/tests/compiletest.md
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@ -415,6 +415,10 @@ Compiletest directives like `//@ only-<target>` or `//@ ignore-<target>` are
supported in `rmake.rs`, like in UI tests. However, revisions or building
auxiliary via directives are not currently supported.
`rmake.rs` and `run-make-support` may *not* use any nightly/unstable features,
as they must be compilable by a stage 0 rustc that may be a beta or even stable
rustc.
#### Quickly check if `rmake.rs` tests can be compiled
You can quickly check if `rmake.rs` tests can be compiled without having to