https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84076
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Summary|[5/6/7/8 Regression] |[6/7/8 Regression] Warning
|Warning about objects |about objects through POD
|through POD mistakenly |mistakenly claims the
|claims the object is a |object is a pointer
|pointer |
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With -Wconditionally-supported you'd get additional warning:
pr84076.C: In function ‘int main()’:
pr84076.C:7:27: warning: passing objects of non-trivially-copyable type
‘std::__cxx11::string’ {aka ‘class std::__cxx11::basic_string<char>’} through
‘...’ is conditionally supported [-Wconditionally-supported]
printf("%s\n", str);
^
The reason for the std::string * in diagnostics is that is how we actually
implement the ... passing of non-trivially-copyable objects, we pass them by
invisible reference as they are passed to named arguments, and the -Wformat
code can't find anymore whether the user actually passed the std::string object
or an address of it.
