Fix language/bad_constructor_test in dartk and analyzer.

pkg/analyzer/lib/src/generated/error_verifier.dart

Index: pkg/analyzer/lib/src/generated/error_verifier.dart
diff --git a/pkg/analyzer/lib/src/generated/error_verifier.dart b/pkg/analyzer/lib/src/generated/error_verifier.dart
index 1b99f57aaca59e32d6d22f80900cde5fe13cba4e..d15dae76cdef88873906051bf13cbd5ee10f381b 100644
--- a/pkg/analyzer/lib/src/generated/error_verifier.dart
+++ b/pkg/analyzer/lib/src/generated/error_verifier.dart
@@ -2706,8 +2706,8 @@ class ErrorVerifier extends RecursiveAstVisitor<Object> {
     if (constructorName != null &&
         constructorElement != null &&
         !constructorName.isSynthetic) {
-      if (classElement.getField(name) != null) {
-        // fields
+      FieldElement field = classElement.getField(name);
+      if (field != null && field.getter != null) {
         _errorReporter.reportErrorForNode(
             CompileTimeErrorCode.CONFLICTING_CONSTRUCTOR_NAME_AND_FIELD,
             constructor,