From 5b38cb9a6975c0a72526db4a92190dcbf483eb29 Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Tue, 16 Dec 2014 00:34:51 -0800
Subject: [PATCH] harden 'get import declaration' logic

---
 src/compiler/checker.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 24f5a2f528d..20033d4c80b 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -4742,7 +4742,9 @@ module ts {
                 nodeLinks.importOnRightSide = undefined;
 
                 getSymbolLinks(rightSide).referenced = true;
-                nodeLinks = getNodeLinks(rightSide.declarations[0])
+                Debug.assert((rightSide.flags & SymbolFlags.Import) !== 0);
+
+                nodeLinks = getNodeLinks(getDeclarationOfKind(rightSide, SyntaxKind.ImportDeclaration))
             }
         }
 
@@ -4773,7 +4775,7 @@ module ts {
                 }
                 
                 if (symbolLinks.referenced) {
-                    markLinkedImportsAsReferenced(<ImportDeclaration>symbol.declarations[0]);
+                    markLinkedImportsAsReferenced(<ImportDeclaration>getDeclarationOfKind(symbol, SyntaxKind.ImportDeclaration));
                 }
             }
 
@@ -8906,7 +8908,7 @@ module ts {
                         // Mark the import as referenced so that we emit it in the final .js file.
                         getSymbolLinks(symbol).referenced = true;
                         // mark any import declarations that depend upon this import as referenced
-                        markLinkedImportsAsReferenced(<ImportDeclaration>symbol.declarations[0])
+                        markLinkedImportsAsReferenced(<ImportDeclaration>getDeclarationOfKind(symbol, SyntaxKind.ImportDeclaration))
                     }
                 }