From a8a8826f69f8caad309fd702a2d237047bee3224 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 4 Jul 2016 20:27:59 -0700
Subject: [PATCH] Exclude FlowSwitchClause from flow graph for case expressions

---
 src/compiler/binder.ts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index b45af24d4d1..b7852a64d04 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -551,6 +551,9 @@ namespace ts {
                 case SyntaxKind.CaseBlock:
                     bindCaseBlock(<CaseBlock>node);
                     break;
+                case SyntaxKind.CaseClause:
+                    bindCaseClause(<CaseClause>node);
+                    break;
                 case SyntaxKind.LabeledStatement:
                     bindLabeledStatement(<LabeledStatement>node);
                     break;
@@ -989,6 +992,14 @@ namespace ts {
             }
         }
 
+        function bindCaseClause(node: CaseClause): void {
+            const saveCurrentFlow = currentFlow;
+            currentFlow = preSwitchCaseFlow;
+            bind(node.expression);
+            currentFlow = saveCurrentFlow;
+            forEach(node.statements, bind);
+        }
+
         function pushActiveLabel(name: string, breakTarget: FlowLabel, continueTarget: FlowLabel): ActiveLabel {
             const activeLabel = {
                 name,