Public bug reported: Hi all,
Mktime has different results when using dates that coincide with times that "didn't" exist due to a change of the reference for the specific timezone. In the examples I've run, when it's first called, it returns a past (IMHO invalid) value. After it's called for another date, calling it again for the first date, returns the expected result. I found this happens on 1912-01-01 for Europe/Lisbon timezone and 1910-10-01 for Europe/Istanbul and it may be happening on other cases. I also found a similar case where it doesn't happen, 1940-05-15 for Europe/Amsterdam. The tests I made are available here: https://gist.github.com/fmfdias/5c7c36726ff3cce12ead Running them: gcc test_europe_lisbon_glibc.c -o test_europe_lisbon_glibc TZ='Europe/Lisbon' ./test_europe_lisbon_glibc gcc test_europe_istanbul_glibc.c -o test_europe_istanbul_glibc TZ='Europe/Istanbul' ./test_europe_istanbul_glibc gcc test_europe_amsterdam_glibc.c -o test_europe_amsterdam_glibc TZ='Europe/Amsterdam' ./test_europe_amsterdam_glibc Although I run these tests on Ubuntu 14.10, I saw this also happening on a Ubuntu 12.04 machine. lsb_release -rd Description: Ubuntu 14.10 Release: 14.10 sudo apt-cache policy libc6 libc6: Installed: 2.19-10ubuntu2.3 Candidate: 2.19-10ubuntu2.3 Version table: *** 2.19-10ubuntu2.3 0 500 http://archive.ubuntu.com/ubuntu/ utopic-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ utopic-security/main amd64 Packages 100 /var/lib/dpkg/status 2.19-10ubuntu2 0 500 http://archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages Thank you! ** Affects: glibc (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1437534 Title: unstable mktime result To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1437534/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
