[Bug c++/50285] no known conversion for argument 1: 'X' to 'X&'

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50285

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2011-09-04
     Ever Confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-09-04 
18:06:54 UTC ---
An error message is not a bug, please follow the bug reporting instructions and
provide source code for a testcase demonstrating your problem:
http://gcc.gnu.org/bugs/

The message clearly isn't about converting a type to  itself, it's about
converting a type to a non-const lvalue reference to that type (X is not the
same as X&)

I assume it means you're trying to pass an rvalue (e.g. a temporary) to a
function that requires an lvalue

e.g. this produces a similar error

struct X {
  X& operator=(X&);
};

X f();

void g()
{
  X x;
  x = f();
}