[Bug c++/96689] New: Segmentation fault when defaulting operator<=> on enum er enum class

[breyer.marcel at web dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96689

            Bug ID: 96689
           Summary: Segmentation fault when defaulting operator<=> on enum
                    er enum class
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: breyer.marcel at web dot de
  Target Milestone: ---

Defaulting the default comparison operator (operator<=>) on an enum or enum
class causes a segmentation fault.


#include <compare>

enum class test {
    one,
    two,
    three
};

std::strong_ordering operator<=>(const test, const test) = default;


Causes on GCC trunk (https://godbolt.org/z/KzxPq3):

<source>:9:60: internal compiler error: Segmentation fault

    9 | std::strong_ordering operator<=>(const test, const test) = default;

      |                                                            ^~~~~~~

Please submit a full bug report,

with preprocessed source if appropriate.