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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
commit 1a2b90bc91
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4
library/alloc/src/lib.rs
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@ -56,6 +56,10 @@
//! [`Rc`]: rc
//! [`RefCell`]: core::cell
// To run liballoc tests without x.py without ending up with two copies of liballoc, 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))]
#![allow(unused_attributes)]
#![stable(feature = "alloc", since = "1.36.0")]
#![doc(

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/",