[Bug c++/92650] New: internal compiler error: canonical types differ for identical types

[ldalessandro at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92650

            Bug ID: 92650
           Summary: internal compiler error: canonical types differ for
                    identical types
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ldalessandro at gmail dot com
  Target Milestone: ---

Created attachment 47349
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47349&action=edit
test case

Following code triggers ICE on (godbolt) trunk only. See
https://godbolt.org/z/q4CrvX.

It's hard for me to disambiguate from other reports with the same error
message, but it seems new.


#include <range/v3/all.hpp>

struct Wrapper {
    int a[1];

    constexpr operator int() const { return a[0]; }
};

int main() {
    std::vector<int> a;
    auto all = ranges::views::all(a);
    auto zip = ranges::views::zip(a);

    Wrapper b;
    *all.begin() = b;
    *zip.begin() = b;
}