diff --git a/build_sysroot/Cargo.lock b/build_sysroot/Cargo.lock
index 86ea1a08ea36..247303951a82 100644
--- a/build_sysroot/Cargo.lock
+++ b/build_sysroot/Cargo.lock
@@ -112,9 +112,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.12.1"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db0d4cf898abf0081f964436dc980e96670a0f36863e4b83aaacdb65c9d7ccc3"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 dependencies = [
  "compiler_builtins",
  "rustc-std-workspace-alloc",
diff --git a/example/mini_core.rs b/example/mini_core.rs
index 489259d1a6bc..8b6042a3d663 100644
--- a/example/mini_core.rs
+++ b/example/mini_core.rs
@@ -458,7 +458,7 @@ pub trait FnMut<Args>: FnOnce<Args> {
 
 #[lang = "panic"]
 #[track_caller]
-pub fn panic(_msg: &str) -> ! {
+pub fn panic(_msg: &'static str) -> ! {
     unsafe {
         libc::puts("Panicking\n\0" as *const str as *const i8);
         intrinsics::abort();
@@ -497,7 +497,7 @@ pub trait Deref {
 #[repr(transparent)]
 #[rustc_layout_scalar_valid_range_start(1)]
 #[rustc_nonnull_optimization_guaranteed]
-pub struct NonNull<T: ?Sized>(pub *mut T);
+pub struct NonNull<T: ?Sized>(pub *const T);
 
 impl<T: ?Sized, U: ?Sized> CoerceUnsized<NonNull<U>> for NonNull<T> where T: Unsize<U> {}
 impl<T: ?Sized, U: ?Sized> DispatchFromDyn<NonNull<U>> for NonNull<T> where T: Unsize<U> {}
@@ -521,7 +521,7 @@ impl<T: ?Sized> Drop for Box<T> {
     }
 }
 
-impl<T> Deref for Box<T> {
+impl<T: ?Sized> Deref for Box<T> {
     type Target = T;
 
     fn deref(&self) -> &Self::Target {
diff --git a/rust-toolchain b/rust-toolchain
index 9c7d75939c9e..5c8cab5f1380 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2022-07-03"
+channel = "nightly-2022-07-18"
 components = ["rust-src", "rustc-dev", "llvm-tools-preview"]