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d6ceae0fd8
- Fixed test name, it should've been `rustc_bootstrap.rs`, oops. - Slightly reworded test comment to make it more clear.
48 lines
1.9 KiB
Rust
48 lines
1.9 KiB
Rust
//! Check the compiler's behavior when the perma-unstable env var `RUSTC_BOOTSTRAP` is set in the
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//! environment in relation to feature stability and which channel rustc considers itself to be.
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//!
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//! `RUSTC_BOOTSTRAP` accepts:
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//!
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//! - `1`: cheat, allow usage of unstable features even if rustc thinks it is a stable compiler.
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//! - `x,y,z`: comma-delimited list of crates.
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//! - `-1`: force rustc to think it is a stable compiler.
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// ignore-tidy-linelength
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//@ revisions: default_nightly cheat cheat_single_crate cheat_multi_crate force_stable invalid_zero invalid_junk
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//@ only-nightly
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//@[default_nightly] unset-rustc-env:RUSTC_BOOTSTRAP
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//@[default_nightly] check-pass
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// For a nightly compiler, this is same as `default_nightly` as if `RUSTC_BOOTSTRAP` was unset.
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//@[invalid_zero] rustc-env:RUSTC_BOOTSTRAP=0
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//@[invalid_zero] check-pass
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// Invalid values are silently discarded, same as `default_nightly`, i.e. as if `RUSTC_BOOTSTRAP`
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// was unset.
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//@[invalid_junk] rustc-env:RUSTC_BOOTSTRAP=*
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//@[invalid_junk] check-pass
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//@[cheat] rustc-env:RUSTC_BOOTSTRAP=1
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//@[cheat] check-pass
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//@[cheat_single_crate] rustc-env:RUSTC_BOOTSTRAP=x
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//@[cheat_single_crate] check-pass
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//@[cheat_multi_crate] rustc-env:RUSTC_BOOTSTRAP=x,y,z
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//@[cheat_multi_crate] check-pass
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// Note: compiletest passes some `-Z` flags to the compiler for ui testing purposes, so here we
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// instead abuse the fact that `-Z unstable-options` is also part of rustc's stability story and is
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// also affected by `RUSTC_BOOTSTRAP`.
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//@[force_stable] rustc-env:RUSTC_BOOTSTRAP=-1
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//@[force_stable] compile-flags: -Z unstable-options
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//@[force_stable] regex-error-pattern: error: the option `Z` is only accepted on the nightly compiler
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#![crate_type = "lib"]
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// Note: `rustc_attrs` is a perma-unstable internal feature that is unlikely to change, which is
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// used as a proxy to check `RUSTC_BOOTSTRAP` versus stability checking logic.
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#![feature(rustc_attrs)]
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