Make sure guint64 is not overflown

6 jobs for issue-777-2 in 4 minutes and 51 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #523291
build

00:03:52

passed #523296
build_android

00:01:07

passed #523292
build_clang_libcpp

00:03:54

passed #523295
build_clazy

00:03:27

passed #523294
build_mingw64_fedora

00:04:25

passed #523293
build_ubuntu_16_04

00:04:50