diff --git a/library/core/src/array/mod.rs b/library/core/src/array/mod.rs
index 71548bec7aaee..a6b0e3280b1d4 100644
--- a/library/core/src/array/mod.rs
+++ b/library/core/src/array/mod.rs
@@ -463,6 +463,61 @@ impl<T, const N: usize> [T; N] {
         unsafe { crate::mem::transmute_copy::<_, [U; N]>(&dst) }
     }
 
+    /// A fallible function `f` applied to each element on array `self` in order to
+    /// return an array the same size as `self` or the first error encountered.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(array_try_map)]
+    /// #![feature(array_map)]
+    /// let a = ["1", "2", "3"];
+    /// let b = a.try_map(|v| v.parse::<u32>()).unwrap().map(|v| v + 1);
+    /// assert_eq!(b, [2, 3, 4]);
+    ///
+    /// let a = ["1", "2a", "3"];
+    /// let b = a.try_map(|v| v.parse::<u32>());
+    /// assert!(b.is_err());
+    /// ```
+    #[unstable(feature = "array_try_map", issue = "79711")]
+    pub fn try_map<F, E, U>(self, mut f: F) -> Result<[U; N], E>
+    where
+        F: FnMut(T) -> Result<U, E>,
+    {
+        use crate::mem::MaybeUninit;
+        struct Guard<T, const N: usize> {
+            dst: *mut T,
+            initialized: usize,
+        }
+
+        impl<T, const N: usize> Drop for Guard<T, N> {
+            fn drop(&mut self) {
+                debug_assert!(self.initialized <= N);
+
+                let initialized_part =
+                    crate::ptr::slice_from_raw_parts_mut(self.dst, self.initialized);
+                // SAFETY: this raw slice will contain only initialized objects
+                // that's why, it is allowed to drop it.
+                unsafe {
+                    crate::ptr::drop_in_place(initialized_part);
+                }
+            }
+        }
+        let mut dst = MaybeUninit::uninit_array::<N>();
+        let mut guard: Guard<U, N> =
+            Guard { dst: MaybeUninit::slice_as_mut_ptr(&mut dst), initialized: 0 };
+        for (src, dst) in IntoIter::new(self).zip(&mut dst) {
+            dst.write(f(src)?);
+            guard.initialized += 1;
+        }
+        // FIXME: Convert to crate::mem::transmute once it works with generics.
+        // unsafe { crate::mem::transmute::<[MaybeUninit<U>; N], [U; N]>(dst) }
+        crate::mem::forget(guard);
+        // SAFETY: At this point we've properly initialized the whole array
+        // and we just need to cast it to the correct type.
+        unsafe { Ok(crate::mem::transmute_copy::<_, [U; N]>(&dst)) }
+    }
+
     /// 'Zips up' two arrays into a single array of pairs.
     ///
     /// `zip()` returns a new array where every element is a tuple where the
diff --git a/library/stdarch b/library/stdarch
index 9c732a56f67f5..777efaf564470 160000
--- a/library/stdarch
+++ b/library/stdarch
@@ -1 +1 @@
-Subproject commit 9c732a56f67f54d12a0b4fd99993154906c95ea6
+Subproject commit 777efaf5644706b36706a7a5c51edb63835e05ca
diff --git a/src/doc/book b/src/doc/book
index 5bb44f8b5b0aa..a190438d77d28 160000
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit 5bb44f8b5b0aa105c8b22602e9b18800484afa21
+Subproject commit a190438d77d28041f24da4f6592e287fab073a61
diff --git a/src/doc/nomicon b/src/doc/nomicon
index a5a48441d411f..d8383b65f7948 160000
--- a/src/doc/nomicon
+++ b/src/doc/nomicon
@@ -1 +1 @@
-Subproject commit a5a48441d411f61556b57d762b03d6874afe575d
+Subproject commit d8383b65f7948c2ca19191b3b4bd709b403aaf45
diff --git a/src/doc/reference b/src/doc/reference
index b278478b76617..a8afdca5d0715 160000
--- a/src/doc/reference
+++ b/src/doc/reference
@@ -1 +1 @@
-Subproject commit b278478b766178491a8b6f67afa4bcd6b64d977a
+Subproject commit a8afdca5d0715b2257b6f8b9a032fd4dd7dae855
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
index 1cce0737d6a7d..236c734a2cb32 160000
--- a/src/doc/rust-by-example
+++ b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit 1cce0737d6a7d3ceafb139b4a206861fb1dcb2ab
+Subproject commit 236c734a2cb323541b3394f98682cb981b9ec086
diff --git a/src/llvm-project b/src/llvm-project
index 8d78ad13896b9..7ade8dc4b8414 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 8d78ad13896b955f630714f386a95ed91b237e3d
+Subproject commit 7ade8dc4b84142abd3e6d1fb8a0f4111b0bbd571
diff --git a/src/tools/cargo b/src/tools/cargo
index 75d5d8cffe346..63d0fe43449ad 160000
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit 75d5d8cffe3464631f82dcd3c470b78dc1dda8bb
+Subproject commit 63d0fe43449adcb316d34d98a982b597faca4178
diff --git a/src/tools/miri b/src/tools/miri
index 2065b52dfef3c..47acece7aa25d 160000
--- a/src/tools/miri
+++ b/src/tools/miri
@@ -1 +1 @@
-Subproject commit 2065b52dfef3cd5a5216e65c21a056a69574bddc
+Subproject commit 47acece7aa25d7b5edfae0bfd4b94e6e55a7b4b0
diff --git a/src/tools/rls b/src/tools/rls
index 2cf84baa5e3c5..dab1468d6aeed 160000
--- a/src/tools/rls
+++ b/src/tools/rls
@@ -1 +1 @@
-Subproject commit 2cf84baa5e3c55ac02f42919e67440acb5417125
+Subproject commit dab1468d6aeed0e49f7d0569c1d2128b5a7751e0
diff --git a/src/tools/rustfmt b/src/tools/rustfmt
index acd94866fd0ff..580d826e9b0f4 160000
--- a/src/tools/rustfmt
+++ b/src/tools/rustfmt
@@ -1 +1 @@
-Subproject commit acd94866fd0ff5eacb7e184ae21c19e5440fc5fb
+Subproject commit 580d826e9b0f407a2d4b36696cda2f0fa8d7ddaa