https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97479
Bug ID: 97479 Summary: Auto as template argument Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: anders.granlund.0 at gmail dot com Target Milestone: --- Consider the following program: template<typename> class A { }; int main() { A<auto> a = A<void>(); } It is accepted when compiling it with "-std=c++20 -pedantic-errors". The expected behaviour is that the compiler should reject the program. Note that clang correctly rejects it: https://godbolt.org/z/nnh5c7