Hide Forgot
Created attachment 1200837 [details] Preprocessed source code Description of problem: Some code that compiles and runs correctly with the default Fedora options in x86, x86_64 and armv7 produces incorrect results on aarch64. Reducing optimisation from -02 to 01 corrects the output Version-Release number of selected component (if applicable): gcc-6.2.1-1.fc26.aarch64 Steps to Reproduce: I've managed to cut the problem code down to this example (preprocessed code is attached): #include <boost/geometry.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/linestring.hpp> #include <boost/geometry/algorithms/is_simple.hpp> using point = boost::geometry::model::point<double, 2, boost::geometry::cs::cartesian>; using linestring = boost::geometry::model::linestring<point>; int main(int argc, char **argv) { linestring geom; boost::geometry::append(geom, point(18883003.4675699,-5400734.67051741)); boost::geometry::append(geom, point(18980842.863775,-5312679.21393289)); boost::geometry::append(geom, point(19049330.4411185,-5234407.69696887)); boost::geometry::append(geom, point(18883003.4675699,-5400734.67051741)); assert(boost::geometry::is_simple(geom)); } The assertion should not fire, but it does when compiled with -O2 on aarch64. A binary search of the options enabled when going from -O1 to -02 suggests that -fexpensive-optimizations is triggering the problem. Compiling with -fsanitize=undefined does not report any undefined behaviour.
This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle. Changing version to '26'.
This message is a reminder that Fedora 26 is nearing its end of life. Approximately 4 (four) weeks from now Fedora will stop maintaining and issuing updates for Fedora 26. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '26'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 26 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Fedora 26 changed to end-of-life (EOL) status on 2018-05-29. Fedora 26 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.