diff --git a/rust-toolchain b/rust-toolchain
index 0d407f11994b..94b57d506c20 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2022-03-17"
+channel = "nightly-2022-03-27"
 components = ["rustc-dev"]
diff --git a/src/lists.rs b/src/lists.rs
index 97eea19f9321..e87850507824 100644
--- a/src/lists.rs
+++ b/src/lists.rs
@@ -575,7 +575,7 @@ pub(crate) struct ListItems<'a, I, F1, F2, F3>
 pub(crate) fn extract_pre_comment(pre_snippet: &str) -> (Option<String>, ListItemCommentStyle) {
     let trimmed_pre_snippet = pre_snippet.trim();
     // Both start and end are checked to support keeping a block comment inline with
-    // the item, even if there are preceeding line comments, while still supporting
+    // the item, even if there are preceding line comments, while still supporting
     // a snippet that starts with a block comment but also contains one or more
     // trailing single line comments.
     // https://github.com/rust-lang/rustfmt/issues/3025
diff --git a/src/parse/macros/lazy_static.rs b/src/parse/macros/lazy_static.rs
index 4c541de04be0..a8c2feec453c 100644
--- a/src/parse/macros/lazy_static.rs
+++ b/src/parse/macros/lazy_static.rs
@@ -16,7 +16,7 @@ macro_rules! parse_or {
         ($method:ident $(,)* $($arg:expr),* $(,)*) => {
             match parser.$method($($arg,)*) {
                 Ok(val) => {
-                    if parser.sess.span_diagnostic.has_errors() {
+                    if parser.sess.span_diagnostic.has_errors().is_some() {
                         parser.sess.span_diagnostic.reset_err_count();
                         return None;
                     } else {
diff --git a/src/parse/macros/mod.rs b/src/parse/macros/mod.rs
index fd738908170f..3728f3a19b44 100644
--- a/src/parse/macros/mod.rs
+++ b/src/parse/macros/mod.rs
@@ -28,7 +28,7 @@ macro_rules! parse_macro_arg {
             let mut cloned_parser = (*parser).clone();
             match $parser(&mut cloned_parser) {
                 Ok(x) => {
-                    if parser.sess.span_diagnostic.has_errors() {
+                    if parser.sess.span_diagnostic.has_errors().is_some() {
                         parser.sess.span_diagnostic.reset_err_count();
                     } else {
                         // Parsing succeeded.
diff --git a/src/parse/session.rs b/src/parse/session.rs
index bf9acd435b92..7571e6d078a7 100644
--- a/src/parse/session.rs
+++ b/src/parse/session.rs
@@ -255,8 +255,10 @@ pub(crate) fn get_original_snippet(&self, file_name: &FileName) -> Option<Lrc<St
 // Methods that should be restricted within the parse module.
 impl ParseSess {
     pub(super) fn emit_diagnostics(&self, diagnostics: Vec<Diagnostic>) {
-        for diagnostic in diagnostics {
-            self.parse_sess.span_diagnostic.emit_diagnostic(&diagnostic);
+        for mut diagnostic in diagnostics {
+            self.parse_sess
+                .span_diagnostic
+                .emit_diagnostic(&mut diagnostic);
         }
     }
 
@@ -265,7 +267,7 @@ pub(super) fn can_reset_errors(&self) -> bool {
     }
 
     pub(super) fn has_errors(&self) -> bool {
-        self.parse_sess.span_diagnostic.has_errors()
+        self.parse_sess.span_diagnostic.has_errors().is_some()
     }
 
     pub(super) fn reset_errors(&self) {
diff --git a/src/types.rs b/src/types.rs
index b13e75a93b35..64a201e45ddd 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -251,7 +251,7 @@ fn rewrite_segment(
         match **args {
             ast::GenericArgs::AngleBracketed(ref data) if !data.args.is_empty() => {
                 // HACK: squeeze out the span between the identifier and the parameters.
-                // The hack is requried so that we don't remove the separator inside macro calls.
+                // The hack is required so that we don't remove the separator inside macro calls.
                 // This does not work in the presence of comment, hoping that people are
                 // sane about where to put their comment.
                 let separator_snippet = context