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Rollup merge of #87255 - RalfJung:miri-test-libcore, r=Mark-Simulacrum

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better support for running libcore tests with Miri

See https://github.com/rust-lang/miri-test-libstd/issues/4 for a description of the problem that this fixes.
Thanks to `@hyd-dev` for suggesting this patch!
This commit is contained in:
Yuki Okushi
2021-07-24 04:31:07 +09:00
committed by GitHub
parent aca83f1ab8 6cba79851a
commit 1a2b90bc91
2 changed files with 8 additions and 0 deletions
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4
library/core/src/lib.rs
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@@ -49,6 +49,10 @@
//
// This cfg won't affect doc tests.
#![cfg(not(test))]
// To run libcore tests without x.py without ending up with two copies of libcore, Miri needs to be
// able to "empty" this crate. See <https://github.com/rust-lang/miri-test-libstd/issues/4>.
// rustc itself never sets the feature, so this line has no affect there.
#![cfg(any(not(feature = "miri-test-libstd"), test, doctest))]
#![stable(feature = "core", since = "1.6.0")]
#![doc(
html_playground_url = "https://play.rust-lang.org/",