Auto merge of #67560 - Centril:rollup-fzdpu9c, r=Centril

Rollup of 8 pull requests

Successful merges:

 - #67233 (Add PartialEq and Eq to Cursor)
 - #67466 (Require const stability attributes on intrinsics to be able to use them in constant contexts)
 - #67507 (Remove mem::uninitalized from tests)
 - #67527 (Results show too much)
 - #67536 (Move `{hir::lowering -> hir}::is_range_literal`)
 - #67538 (Improve diagnostics for invalid assignment)
 - #67546 (Fix ICE in mir interpretation)
 - #67559 (Document that calling Drop, even after it panics, is UB)

Failed merges:

r? @ghost

1 files changed, 13 insertions, 1 deletions

diff --git a/src/libstd/io/cursor.rs b/src/libstd/io/cursor.rs
index 1492f70436c..9787cbb556b 100644
--- a/src/libstd/io/cursor.rs
+++ b/src/libstd/io/cursor.rs
@@ -72,7 +72,7 @@ use core::convert::TryInto;
 /// }
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
-#[derive(Clone, Debug, Default)]
+#[derive(Clone, Debug, Default, Eq, PartialEq)]
 pub struct Cursor<T> {
     inner: T,
     pos: u64,
@@ -942,4 +942,16 @@ mod tests {
         c.set_position(<usize>::max_value() as u64 + 1);
         assert!(c.write_all(&[1, 2, 3]).is_err());
     }
+
+    #[test]
+    fn test_partial_eq() {
+        assert_eq!(Cursor::new(Vec::<u8>::new()), Cursor::new(Vec::<u8>::new()));
+    }
+
+    #[test]
+    fn test_eq() {
+        struct AssertEq<T: Eq>(pub T);
+
+        let _: AssertEq<Cursor<Vec<u8>>> = AssertEq(Cursor::new(Vec::new()));
+    }
 }