[Bug libstdc++/108517] New: std::sort of empty range yield "warning: 'this' pointer is null"

[hanicka at hanicka dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108517

            Bug ID: 108517
           Summary: std::sort of empty range yield "warning: 'this'
                    pointer is null"
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hanicka at hanicka dot net
  Target Milestone: ---

Bug in GCC 11.1-13 (including trunk)

https://compiler-explorer.com/z/EEjeaKfv7

I couldn't minimize it further. Lowering optimization level will make the
warning gone.