https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86980
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is a bug in your code, not GCC. you're returning a reference to a local
variable, which goes out of scope, leaving a dangling reference.
When you don't give the lambda an explicit return type it returns by value, so
works correctly.
You should just do:
auto f = []() {
Traceable tmp;
return tmp;
};
This returns by value and can elide the move, so is safer and faster.
