fix library and rustdoc tests

Author: fee1-dead

library/alloc/tests/const_fns.rs

@@ -1,13 +1,16 @@
 // Test const functions in the library
 
 pub const MY_VEC: Vec<usize> = Vec::new();
-pub const MY_VEC2: Vec<usize> = Default::default();
+
+// FIXME(#110395)
+// pub const MY_VEC2: Vec<usize> = Default::default();
 
 pub const MY_STRING: String = String::new();
-pub const MY_STRING2: String = Default::default();
 
-pub const MY_BOXED_SLICE: Box<[usize]> = Default::default();
-pub const MY_BOXED_STR: Box<str> = Default::default();
+// pub const MY_STRING2: String = Default::default();
+
+// pub const MY_BOXED_SLICE: Box<[usize]> = Default::default();
+// pub const MY_BOXED_STR: Box<str> = Default::default();
 
 use std::collections::{BTreeMap, BTreeSet};
 
@@ -23,11 +26,11 @@ pub const SET_IS_EMPTY: bool = SET.is_empty();
 
 #[test]
 fn test_const() {
-    assert_eq!(MY_VEC, MY_VEC2);
-    assert_eq!(MY_STRING, MY_STRING2);
+    assert_eq!(MY_VEC, /* MY_VEC */ vec![]);
+    assert_eq!(MY_STRING, /* MY_STRING2 */ String::default());
 
-    assert_eq!(MY_VEC, *MY_BOXED_SLICE);
-    assert_eq!(MY_STRING, *MY_BOXED_STR);
+    // assert_eq!(MY_VEC, *MY_BOXED_SLICE);
+    // assert_eq!(MY_STRING, *MY_BOXED_STR);
 
     assert_eq!(MAP_LEN, 0);
     assert_eq!(SET_LEN, 0);

library/alloc/tests/lib.rs

@@ -3,7 +3,6 @@
 #![feature(assert_matches)]
 #![feature(btree_drain_filter)]
 #![feature(cow_is_borrowed)]
-#![feature(const_convert)]
 #![feature(const_cow_is_borrowed)]
 #![feature(const_heap)]
 #![feature(const_mut_refs)]
@@ -33,7 +32,6 @@
 #![feature(slice_partition_dedup)]
 #![feature(string_remove_matches)]
 #![feature(const_btree_len)]
-#![feature(const_default_impls)]
 #![feature(const_trait_impl)]
 #![feature(const_str_from_utf8)]
 #![feature(panic_update_hook)]