RustPython
diff --git a/‎crates/compiler/src/lib.rs‎
Lines changed: 13 additions & 0 deletions b/‎crates/compiler/src/lib.rs‎
Lines changed: 13 additions & 0 deletions
@@ -362,6 +362,19 @@ fn cpython_parse_diagnostic_override(
         ));
     }
 
+    // CPython's PEG parser collapses a bare "expected an expression" failure
+    // into the generic "invalid syntax" message (e.g. `2 <> 3` outside Barry
+    // mode). rustpython-vm's `vm_new.rs` does this same collapse for its own
+    // callers; rustpython-compiler has no vm dependency, so mirror it here.
+    if matches!(&error.error, parser::ParseErrorType::ExpectedExpression) {
+        let (loc, end_loc) = adjusted_error_locations(source_file, error.location);
+        return Some(NormalizedParseDiagnostic::new(
+            parser::ParseErrorType::OtherError("invalid syntax".into()),
+            loc,
+            end_loc,
+        ));
+    }
+
     None
 }