Auto merge of #66141 - Centril:rollup-n2fcvp9, r=Centril

Rollup of 11 pull requests

Successful merges:

 - #65892 (Remove `PartialEq` and `Eq` from the `SpecialDerives`.)
 - #66014 (Show type parameter name and definition in type mismatch error messages )
 - #66027 (Move has_panic_handler to query)
 - #66054 (syntax: Avoid span arithmetic for delimiter tokens)
 - #66068 (use silent emitter for rustdoc highlighting pass)
 - #66081 (let caller of check_ptr_access_align control the error message)
 - #66093 (Do not ICE with a precision flag in formatting str and no format arguments)
 - #66098 (Detect `::` -> `:` typo when involving turbofish)
 - #66101 (Tweak type mismatch caused by break on tail expr)
 - #66106 (Fix typo in explanation of `E0080`)
 - #66115 (rustc: remove "GlobalMetaData" dead code from hir::map::definitions.)

Failed merges:

r? @ghost

2 files changed, 12 insertions, 4 deletions

diff --git a/src/libsyntax/parse/parser/diagnostics.rs b/src/libsyntax/parse/parser/diagnostics.rs
index fcf3b4c0aa8..453ef5963be 100644
--- a/src/libsyntax/parse/parser/diagnostics.rs
+++ b/src/libsyntax/parse/parser/diagnostics.rs
@@ -360,11 +360,11 @@ impl<'a> Parser<'a> {
     }
 
     pub fn maybe_annotate_with_ascription(
-        &self,
+        &mut self,
         err: &mut DiagnosticBuilder<'_>,
         maybe_expected_semicolon: bool,
     ) {
-        if let Some((sp, likely_path)) = self.last_type_ascription {
+        if let Some((sp, likely_path)) = self.last_type_ascription.take() {
             let sm = self.sess.source_map();
             let next_pos = sm.lookup_char_pos(self.token.span.lo());
             let op_pos = sm.lookup_char_pos(sp.hi());
@@ -1088,8 +1088,15 @@ impl<'a> Parser<'a> {
     }
 
     pub(super) fn could_ascription_be_path(&self, node: &ast::ExprKind) -> bool {
-        self.token.is_ident() &&
-            if let ast::ExprKind::Path(..) = node { true } else { false } &&
+        (self.token == token::Lt && // `foo:<bar`, likely a typoed turbofish.
+            self.look_ahead(1, |t| t.is_ident() && !t.is_reserved_ident())
+        ) ||
+            self.token.is_ident() &&
+            match node {
+                // `foo::` → `foo:` or `foo.bar::` → `foo.bar:`
+                ast::ExprKind::Path(..) | ast::ExprKind::Field(..) => true,
+                _ => false,
+            } &&
             !self.token.is_reserved_ident() &&           // v `foo:bar(baz)`
             self.look_ahead(1, |t| t == &token::OpenDelim(token::Paren)) ||
             self.look_ahead(1, |t| t == &token::Lt) &&     // `foo:bar<baz`
diff --git a/src/libsyntax/parse/parser/stmt.rs b/src/libsyntax/parse/parser/stmt.rs
index 4f51fefe66f..12c530f3cbb 100644
--- a/src/libsyntax/parse/parser/stmt.rs
+++ b/src/libsyntax/parse/parser/stmt.rs
@@ -397,6 +397,7 @@ impl<'a> Parser<'a> {
             }
             let stmt = match self.parse_full_stmt(false) {
                 Err(mut err) => {
+                    self.maybe_annotate_with_ascription(&mut err, false);
                     err.emit();
                     self.recover_stmt_(SemiColonMode::Ignore, BlockMode::Ignore);
                     Some(Stmt {