Issue 6087. Use getRealTarget() for DartPropertyAccess in const analyzer

compiler/javatests/com/google/dart/compiler/resolver/CompileTimeConstantTest.java

Index: compiler/javatests/com/google/dart/compiler/resolver/CompileTimeConstantTest.java
diff --git a/compiler/javatests/com/google/dart/compiler/resolver/CompileTimeConstantTest.java b/compiler/javatests/com/google/dart/compiler/resolver/CompileTimeConstantTest.java
index 5b2d316612be923e78b5bc40d416f70d736616b1..765bab7de4d1848ef30b2a5e291bb40ca593eadd 100644
--- a/compiler/javatests/com/google/dart/compiler/resolver/CompileTimeConstantTest.java
+++ b/compiler/javatests/com/google/dart/compiler/resolver/CompileTimeConstantTest.java
@@ -247,6 +247,21 @@ public class CompileTimeConstantTest extends ResolverTestCase {
             errEx(ResolverErrorCode.EXPECTED_CONSTANT_EXPRESSION, 4, 21, 1));
   }
 
+  public void test_cascade() {
+    resolveAndTestCtConstExpectErrors(
+        Joiner.on("\n").join(
+            "// filler filler filler filler filler filler filler filler filler filler",
+            "main() {",
+            " var v;",
+            " const c = v..foo;",
+            "}",
+            "class Object {}",
+            "class int {}",
+            ""),
+        errEx(ResolverErrorCode.EXPECTED_CONSTANT_EXPRESSION, 4, 12, 1),
+        errEx(ResolverErrorCode.EXPECTED_CONSTANT_EXPRESSION, 4, 13, 5));
+  }
+
   public void test_stringInterpolation_referenceConstVar_String() {
     resolveAndTestCtConstExpectErrors(Joiner.on("\n").join(
         "// filler filler filler filler filler filler filler filler filler filler",