test/langtools/tools/javac/switchextra/RuleParsingTest.java

*** 92,102 ****
          assert tool != null;
          DiagnosticListener<JavaFileObject> noErrors = d -> { throw new AssertionError(d.getMessage(null)); };
  
          StringWriter out = new StringWriter();
          JavacTask ct = (JavacTask) tool.getTask(out, null, noErrors,
!             List.of("--enable-preview", "-source", "12"), null,
              Arrays.asList(new MyFileObject(code.toString())));
          CompilationUnitTree cut = ct.parse().iterator().next();
          Trees trees = Trees.instance(ct);
          new TreePathScanner<Void, Void>() {
              @Override
--- 92,102 ----
          assert tool != null;
          DiagnosticListener<JavaFileObject> noErrors = d -> { throw new AssertionError(d.getMessage(null)); };
  
          StringWriter out = new StringWriter();
          JavacTask ct = (JavacTask) tool.getTask(out, null, noErrors,
!             List.of("--enable-preview", "-source", "13"), null,
              Arrays.asList(new MyFileObject(code.toString())));
          CompilationUnitTree cut = ct.parse().iterator().next();
          Trees trees = Trees.instance(ct);
          new TreePathScanner<Void, Void>() {
              @Override