https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80858
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #7) > <source>:5:8: required from here > /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/unique_ptr.h:97:23: > error: invalid application of 'sizeof' to incomplete type 'A' > 97 | static_assert(sizeof(_Tp)>0, > | ^~~~~~~~~~~ Separately, I have a patch to improve the static assertion here so that it actually prints the static_assert's string literal, instead of giving an error in the boolean condition. But that's specific to the unique_ptr case, and doesn't help the comment 0 and comment 4 examples.
