1 files changed, 37 insertions, 0 deletions

diff --git a/src/test/ui/parser/issues/issue-57684.rs b/src/test/ui/parser/issues/issue-57684.rs
new file mode 100644
index 000000000..7a62785e3
--- /dev/null
+++ b/src/test/ui/parser/issues/issue-57684.rs
@@ -0,0 +1,37 @@
+// run-rustfix
+
+#![allow(warnings)]
+
+// This test checks that the following error is emitted when a `=` character is used to initialize
+// a struct field when a `:` is expected.
+//
+// ```
+// error: struct fields are initialized with a colon
+//   --> $DIR/issue-57684.rs:12:20
+//    |
+// LL |     let _ = X { f1 = 5 };
+//    |                    ^ help: replace equals symbol with a colon: `:`
+// ```
+
+struct X {
+    f1: i32,
+}
+
+struct Y {
+    f1: i32,
+    f2: i32,
+    f3: i32,
+}
+
+fn main() {
+    let _ = X { f1 = 5 };
+    //~^ ERROR expected `:`, found `=`
+
+    let f3 = 3;
+    let _ = Y {
+        f1 = 5,
+        //~^ ERROR expected `:`, found `=`
+        f2: 4,
+        f3,
+    };
+}