[lld][test] fix -Wreturn-type error

llvm-svn: 188988

diff --git a/lld/unittests/DriverTests/DriverTest.h b/lld/unittests/DriverTests/DriverTest.h
index 0ad1918..3da0db3 100644 (file)
--- a/lld/unittests/DriverTests/DriverTest.h
+++ b/lld/unittests/DriverTests/DriverTest.h
@@ -38,6 +38,7 @@ protected:
     if (inputElement.kind() == InputElement::Kind::File)
       return (llvm::dyn_cast<FileNode>(&inputElement))->path(*linkingContext());
     assert(0 && "not handling other types of input files");
+    return "";
   }
 
   // For unit tests to call driver with various command lines.