https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86228
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to eracpp from comment #2) > This bug was observed in the following example: > > https://gcc.godbolt.org/z/p1VreP > > #include <algorithm> > #include <array> > > int main() > { > std::array<int, 3> arr; > > // Mistake: meant to use std::generate. > std::generate_n(arr.begin(), arr.end(), []{ return 0; }); > } > > This code successfully compiles (unexpectedly) with GCC due to `size > 0` > being treated as well-formed in the case where the type of second parameter > `size` is deduced to be a pointer type such as `int*`. That's PR 87982
