I get this: open("/tmp", O_RDWR|O_EXCL|O_DIRECTORY|O_TMPFILE) = 3 openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_DIRECTORY|O_TMPFILE) = 3 O_TMPFILE reqires the mode argument (just like O_CREAT), so strace should show it as well. Seen with strace-4.13-1.fc24.x86_64.
Fixed upstream, thanks!
strace-4.14-1.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-deac750319
strace-4.14-1.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-6560d89b7b
strace-4.14-1.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-aef7c3f412
strace-4.14-1.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.
strace-4.14-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
strace-4.14-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.