Merge pull request #1333 from Microsoft/getOccurancesAssert

Handle const modifier in getOccurrences

src/services/services.ts

@@ -3807,6 +3807,10 @@ module ts {
                         return undefined;
                     }
                 }
+                else { 
+                    // unsupported modifier
+                    return undefined;
+                }
 
                 var keywords: Node[] = [];
                 var modifierFlag: NodeFlags = getFlagFromModifier(modifier);

tests/cases/fourslash/getOccurrencesConst.ts

@@ -0,0 +1,14 @@
+/// <reference path='fourslash.ts' />
+
+/////*1*/const enum E1 {
+////    v1,
+////    v2
+////}
+////
+/////*2*/const c = 0;
+
+goTo.marker("1");
+verify.occurrencesAtPositionCount(0);
+
+goTo.marker("2");
+verify.occurrencesAtPositionCount(0);