2 files changed, 4 insertions, 4 deletions
diff --git a/compiler/rustc_parse/src/parser/expr.rs b/compiler/rustc_parse/src/parser/expr.rs
index c92379754bf..12f65a436e3 100644
--- a/compiler/rustc_parse/src/parser/expr.rs
+++ b/compiler/rustc_parse/src/parser/expr.rs
@@ -2935,8 +2935,8 @@ impl<'a> Parser<'a> {
         pth: ast::Path,
         recover: bool,
         close_delim: Delimiter,
-    ) -> PResult<'a, (Vec<ExprField>, ast::StructRest, bool)> {
-        let mut fields = Vec::new();
+    ) -> PResult<'a, (ThinVec<ExprField>, ast::StructRest, bool)> {
+        let mut fields = ThinVec::new();
         let mut base = ast::StructRest::None;
         let mut recover_async = false;
 
diff --git a/compiler/rustc_parse/src/parser/item.rs b/compiler/rustc_parse/src/parser/item.rs
index 4e338f52f57..c0aed6a3789 100644
--- a/compiler/rustc_parse/src/parser/item.rs
+++ b/compiler/rustc_parse/src/parser/item.rs
@@ -56,12 +56,12 @@ impl<'a> Parser<'a> {
     pub fn parse_mod(
         &mut self,
         term: &TokenKind,
-    ) -> PResult<'a, (AttrVec, Vec<P<Item>>, ModSpans)> {
+    ) -> PResult<'a, (AttrVec, ThinVec<P<Item>>, ModSpans)> {
         let lo = self.token.span;
         let attrs = self.parse_inner_attributes()?;
 
         let post_attr_lo = self.token.span;
-        let mut items = vec![];
+        let mut items = ThinVec::new();
         while let Some(item) = self.parse_item(ForceCollect::No)? {
             items.push(item);
             self.maybe_consume_incorrect_semicolon(&items);