diff -up cmake-3.10.2/Source/cmQtAutoGenerators.cxx.automoc cmake-3.10.2/Source/cmQtAutoGenerators.cxx
--- cmake-3.10.2/Source/cmQtAutoGenerators.cxx.automoc	2018-01-18 07:48:42.000000000 -0700
+++ cmake-3.10.2/Source/cmQtAutoGenerators.cxx	2018-03-08 21:09:50.451726324 -0700
@@ -80,8 +80,8 @@ static bool ReadFile(std::string& conten
     std::size_t const length = cmSystemTools::FileLength(filename);
     cmsys::ifstream ifs(filename.c_str(), (std::ios::in | std::ios::binary));
     if (ifs) {
-      content.resize(length);
-      ifs.read(&content.front(), content.size());
+      content.reserve(length);
+      content.assign(std::istreambuf_iterator<char>{ifs}, {});
       if (ifs) {
         success = true;
       } else {