[Bug c++/105905] New: A possible rounding error

[zhonghao at pku dot org.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105905

            Bug ID: 105905
           Summary: A possible rounding error
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zhonghao at pku dot org.cn
  Target Milestone: ---

magnum is a data visualization library. I notice that its programmers
complained a rounding error in gcc. It occurs when compiling their code in the
release version. To fix the problem, they change their test cases, which is a
workaround:

https://github.com/mosra/magnum/commit/fb51f25a7b613aa5be744deea5a4ddb88f3de064

I also open an issue in magnum. Its programmers can provide more feedback.