From c9644e5e6452a345e9e56fb22264cc17fa832e09 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 27 Mar 2018 13:38:33 -0700
Subject: [PATCH] Anything after Debug.failBadSyntaxKind is dead code

---
 src/compiler/transformers/es2015.ts     |  3 +--
 src/compiler/transformers/generators.ts |  3 +--
 src/compiler/transformers/jsx.ts        |  5 ++---
 src/compiler/transformers/ts.ts         | 13 ++++---------
 4 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/src/compiler/transformers/es2015.ts b/src/compiler/transformers/es2015.ts
index 53b2152bd0544..d432280c7b0c5 100644
--- a/src/compiler/transformers/es2015.ts
+++ b/src/compiler/transformers/es2015.ts
@@ -1510,8 +1510,7 @@ namespace ts {
                         break;
 
                     default:
-                        Debug.failBadSyntaxKind(node);
-                        break;
+                        return Debug.failBadSyntaxKind(node);
                 }
 
                 const captureNewTargetStatement = createVariableStatement(
diff --git a/src/compiler/transformers/generators.ts b/src/compiler/transformers/generators.ts
index 1a4c82020c77c..82d8bc513f07e 100644
--- a/src/compiler/transformers/generators.ts
+++ b/src/compiler/transformers/generators.ts
@@ -430,8 +430,7 @@ namespace ts {
                     return visitFunctionExpression(<FunctionExpression>node);
 
                 default:
-                    Debug.failBadSyntaxKind(node);
-                    return visitEachChild(node, visitor, context);
+                    return Debug.failBadSyntaxKind(node);
             }
         }
 
diff --git a/src/compiler/transformers/jsx.ts b/src/compiler/transformers/jsx.ts
index 25e1ae02ef829..07dc8f74db428 100644
--- a/src/compiler/transformers/jsx.ts
+++ b/src/compiler/transformers/jsx.ts
@@ -72,8 +72,7 @@ namespace ts {
                     return visitJsxFragment(node, /*isChild*/ true);
 
                 default:
-                    Debug.failBadSyntaxKind(node);
-                    return undefined;
+                    return Debug.failBadSyntaxKind(node);
             }
         }
 
@@ -182,7 +181,7 @@ namespace ts {
                 return visitJsxExpression(node);
             }
             else {
-                Debug.failBadSyntaxKind(node);
+                return Debug.failBadSyntaxKind(node);
             }
         }
 
diff --git a/src/compiler/transformers/ts.ts b/src/compiler/transformers/ts.ts
index ecde841bedd0a..f22d8f0287067 100644
--- a/src/compiler/transformers/ts.ts
+++ b/src/compiler/transformers/ts.ts
@@ -324,8 +324,7 @@ namespace ts {
                     return node;
 
                 default:
-                    Debug.failBadSyntaxKind(node);
-                    return undefined;
+                    return Debug.failBadSyntaxKind(node);
             }
         }
 
@@ -531,8 +530,7 @@ namespace ts {
                     return visitImportEqualsDeclaration(<ImportEqualsDeclaration>node);
 
                 default:
-                    Debug.failBadSyntaxKind(node);
-                    return visitEachChild(node, visitor, context);
+                    return Debug.failBadSyntaxKind(node);
             }
         }
 
@@ -1870,10 +1868,8 @@ namespace ts {
                             return createIdentifier("Boolean");
 
                         default:
-                            Debug.failBadSyntaxKind((<LiteralTypeNode>node).literal);
-                            break;
+                            return Debug.failBadSyntaxKind((<LiteralTypeNode>node).literal);
                     }
-                    break;
 
                 case SyntaxKind.NumberKeyword:
                     return createIdentifier("Number");
@@ -1900,8 +1896,7 @@ namespace ts {
                     break;
 
                 default:
-                    Debug.failBadSyntaxKind(node);
-                    break;
+                    return Debug.failBadSyntaxKind(node);
             }
 
             return createIdentifier("Object");