Index: clang-tools-extra/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
+++ clang-tools-extra/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
@@ -30,8 +30,10 @@
 // previously.
 void MultipleInheritanceCheck::addNodeToInterfaceMap(const CXXRecordDecl *Node,
                                                      bool isInterface) {
-  StringRef Name = Node->getIdentifier()->getName();
-  InterfaceMap.insert(std::make_pair(Name, isInterface));
+  if (const auto *Id = Node->getIdentifier()) {
+    StringRef Name = Id->getName();
+    InterfaceMap.insert(std::make_pair(Name, isInterface));
+  }
 }
 
 // Returns "true" if the boolean "isInterface" has been set to the
@@ -39,12 +41,16 @@
 // interface status for the current node is not yet known.
 bool MultipleInheritanceCheck::getInterfaceStatus(const CXXRecordDecl *Node,
                                                   bool &isInterface) const {
-  StringRef Name = Node->getIdentifier()->getName();
-  llvm::StringMapConstIterator<bool> Pair = InterfaceMap.find(Name);
-  if (Pair == InterfaceMap.end())
-    return false;
-  isInterface = Pair->second;
-  return true;
+  if (!Node) return false;
+  if (const auto *Id = Node->getIdentifier()) {
+    StringRef Name = Id->getName();
+    llvm::StringMapConstIterator<bool> Pair = InterfaceMap.find(Name);
+    if (Pair == InterfaceMap.end())
+      return false;
+    isInterface = Pair->second;
+    return true;
+  }
+  return false;
 }
 
 bool MultipleInheritanceCheck::isCurrentClassInterface(
@@ -104,7 +110,7 @@
       const auto *Base = cast<CXXRecordDecl>(Ty->getDecl()->getDefinition());
       if (!isInterface(Base)) NumConcrete++;
     }
-    
+
     // Check virtual bases to see if there is more than one concrete 
     // non-virtual base.
     for (const auto &V : D->vbases()) {