https://issues.dlang.org/show_bug.cgi?id=18187
--- Comment #2 from Seb <greensunn...@gmail.com> --- That's great then. There have been a few changed in std.uni recently, e.g. https://github.com/dlang/phobos/pull/6041 So maybe these changes made the test @safe There's also the fact that Phobos's testsuite now uses -dip1000 to test std.uni, but I just checked and it seems like the tests are now @safe even without -dip1000 :) Up for a quick PR? --