[Bug libstdc++/106452] New: Iteration of filesystem::path("//") results in path("//") and not path("/")

[services+gccbugs at vasama dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106452

            Bug ID: 106452
           Summary: Iteration of filesystem::path("//") results in
                    path("//") and not path("/")
           Product: gcc
           Version: 12.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: services+gccbugs at vasama dot org
  Target Milestone: ---

path("//").begin()->string() returns "//"s and not "/"s as might be expected.
path("//.").begin()->string() returns "/"s as expected.

https://godbolt.org/z/4YdY6bq3a

#include <filesystem>
#include <cassert>
int main() {
    assert(
        std::filesystem::path("//").begin()->string() ==
        std::filesystem::path("//.").begin()->string());
}