Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 13 insertions, 1 deletions

diff --git a/library/core/tests/lib.rs b/library/core/tests/lib.rs
index 99d4a40c4..42a26ae16 100644
--- a/library/core/tests/lib.rs
+++ b/library/core/tests/lib.rs
@@ -48,7 +48,6 @@
 #![feature(is_sorted)]
 #![feature(layout_for_ptr)]
 #![feature(pattern)]
-#![feature(pin_macro)]
 #![feature(sort_internals)]
 #![feature(slice_take)]
 #![feature(slice_from_ptr_range)]
@@ -155,3 +154,16 @@ mod time;
 mod tuple;
 mod unicode;
 mod waker;
+
+/// Copied from `std::test_helpers::test_rng`, see that function for rationale.
+#[track_caller]
+#[allow(dead_code)] // Not used in all configurations.
+pub(crate) fn test_rng() -> rand_xorshift::XorShiftRng {
+    use core::hash::{BuildHasher, Hash, Hasher};
+    let mut hasher = std::collections::hash_map::RandomState::new().build_hasher();
+    core::panic::Location::caller().hash(&mut hasher);
+    let hc64 = hasher.finish();
+    let seed_vec = hc64.to_le_bytes().into_iter().chain(0u8..8).collect::<Vec<u8>>();
+    let seed: [u8; 16] = seed_vec.as_slice().try_into().unwrap();
+    rand::SeedableRng::from_seed(seed)
+}