Report compile time errors when assert initializers fail.

pkg/analyzer/lib/src/dart/constant/evaluation.dart

Index: pkg/analyzer/lib/src/dart/constant/evaluation.dart
diff --git a/pkg/analyzer/lib/src/dart/constant/evaluation.dart b/pkg/analyzer/lib/src/dart/constant/evaluation.dart
index fc3ee08a412129963d06152b5ec9e98c641ff8a3..b0f65238a218fdb30f3991257d576571ee207e2f 100644
--- a/pkg/analyzer/lib/src/dart/constant/evaluation.dart
+++ b/pkg/analyzer/lib/src/dart/constant/evaluation.dart
@@ -706,7 +706,24 @@ class ConstantEvaluationEngine {
     String superName = null;
     NodeList<Expression> superArguments = null;
     for (ConstructorInitializer initializer in initializers) {
-      if (initializer is ConstructorFieldInitializer) {
+      if (initializer is AssertInitializer) {
+        Expression condition = initializer.condition;
+        DartObjectImpl conditionResult = condition?.accept(initializerVisitor);
+        if (conditionResult != null) {
+          if (conditionResult.isBool) {
+            if (!conditionResult.toBoolValue()) {
+              errorReporter.reportErrorForNode(
+                  CompileTimeErrorCode.CONST_EVAL_THROWS_ASSERT_FALSE, node);
+            }
+          } else {
+            errorReporter.reportErrorForNode(
+                CompileTimeErrorCode.CONST_EVAL_THROWS_ASSERT_NOT_BOOL, node);
+          }
+        } else {
+          errorReporter.reportErrorForNode(
+              CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION, node);
+        }
+      } else if (initializer is ConstructorFieldInitializer) {
         Expression initializerExpression = initializer.expression;
         DartObjectImpl evaluationResult =
             initializerExpression?.accept(initializerVisitor);