[Bug c++/61587] Line number of code that triggers "use of deleted function" error is absent from error message

["redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61587

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-06-24
     Ever confirmed|0                           |1

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:

template<typename T>
struct vector {
  T t;
  vector(const vector& v) : t(v.t) { }
  vector() { }
};

struct U_ptr {
  U_ptr() = default;
  U_ptr(U_ptr&&) = default;
};

class A {
  vector<U_ptr> v;
};

void f() {
    A a1;
    A a2(a1); // the error is here
}

Compiling with -std=c++11 gives:

r.cc: In instantiation of âvector<T>::vector(const vector<T>&) [with T =
U_ptr]â:
r.cc:13:7:   required from here
r.cc:4:34: error: use of deleted function âconstexpr U_ptr::U_ptr(const
U_ptr&)â
   vector(const vector& v) : t(v.t) { }
                                  ^
r.cc:8:8: note: âconstexpr U_ptr::U_ptr(const U_ptr&)â is implicitly declared
as deleted because âU_ptrâ declares a move constructor or move assignment
operator
 struct U_ptr {
        ^


Not a regression.

Clang gives very similar output, without pointing to the invalid copy
construction.

EDG says the error happens due to the implicit generation of A's copy
constructor at line 19.