[Bug c++/106812] Throwing a non-copyable exception

[mpolacek at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106812

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The difference between #3 and not-#3 is that without the NSDMI, S isn't
TYPE_NEEDS_CONSTRUCTING, which makes a difference in initialize_handler_parm:

 339   /* If the constructor for the catch parm exits via an exception, we
 340      must call terminate.  See eh23.C.  */
 341   if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
 342     {
 343       /* Generate the copy constructor call directly so we can wrap it.
 344          See also expand_default_init.  */
 345       init = ocp_convert (TREE_TYPE (decl), init,
 346                           CONV_IMPLICIT|CONV_FORCE_TEMP, 0,
 347                           tf_warning_or_error);