Index: unittests/AST/ASTImporterTest.cpp
===================================================================
--- unittests/AST/ASTImporterTest.cpp
+++ unittests/AST/ASTImporterTest.cpp
@@ -213,7 +213,7 @@
     TranslationUnitDecl *TUDecl = nullptr;
     TU(StringRef Code, StringRef FileName, ArgVector Args)
         : Code(Code), FileName(FileName),
-          Unit(tooling::buildASTFromCodeWithArgs(this->Code, Args,
+          Unit(tooling::buildASTFromCodeWithArgs(this->Code.data(), Args,
                                                  this->FileName)),
           TUDecl(Unit->getASTContext().getTranslationUnitDecl()) {}
   };