https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99686
--- Comment #1 from Steven Sun <StevenSun2021 at hotmail dot com> --- The compiler args are only "g++ -fconcepts -std=c++17" It should choose the full specialization func(int &&), while the compiler aborts during the instatiation of the partial specialization (using concepts). If either the partial or the full specialzation is removed, it compiles. New online compiler link: https://godbolt.org/z/fK5G61 ------------------------------------------------------------------------- template <typename T> void func(T &&arg) { } template <typename T> requires requires(T t) { ++t; } void func(T &&arg) { } template <> void func(int &&arg) { } int main() { func(1); // I am expecting func(int&&) } ------------------------------------------------------------------------- Error: In instantiation of ‘void func(T&&) [with T = int]’: internal compiler error: Segmentation fault 11 | } | ^ Please submit a full bug report,
