[Bug c++/106584] New: g++ not showing correct line number in "use of deleted function" error

[Bug c++/106584] New: g++ not showing correct line number in "use of deleted function" error

[accelerator0099 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106584

            Bug ID: 106584
           Summary: g++ not showing correct line number in "use of deleted
                    function" error
           Product: gcc
           Version: 12.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: accelerator0099 at gmail dot com
  Target Milestone: ---

Example code:
----------------------------------------------------
#include <map>
#include <memory>

using int_map = std::map<int, std::unique_ptr<int>>;

void f(int_map cl);

void f2() {
    int_map cl;
    f(cl);
}
----------------------------------------------------

The actual error is that int_map is not copiable, so line 10 is ill-formed
But the compiler doesn't tell you anything about line 10, it just prints tons
of waste

This is unreasonable. You may make such a careless mistake (missing a '&') in
thousands of lines, the compiler should locate where the error is for you.

[Bug c++/106584] g++ not showing correct line number in "use of deleted function" error

[accelerator0099 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106584

--- Comment #1 from Devourer Station <accelerator0099 at gmail dot com> ---
Created attachment 53436
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53436&action=edit
Preprocessed source file

compile with g++ example.cpp -c

[Bug c++/106584] g++ not showing correct line number in "use of deleted function" error

[accelerator0099 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106584

--- Comment #2 from Devourer Station <accelerator0099 at gmail dot com> ---
Created attachment 53437
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53437&action=edit
compiler's output

[Bug c++/106584] g++ not showing correct line number in "use of deleted function" error

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106584

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
clang prints out the similar message (even with libc++).

[Bug c++/106584] g++ not showing correct line number in "use of deleted function" error

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106584

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Actually clang references the call:
f(cl);

When it comes to the copy constructor.

[Bug c++/106584] g++ not showing correct line number in "use of deleted function" error

[accelerator0099 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106584

--- Comment #5 from Devourer Station <accelerator0099 at gmail dot com> ---
(In reply to Andrew Pinski from comment #4)
> Actually clang references the call:
> f(cl);
> 
> When it comes to the copy constructor.

At least it tells you about where the error is, otherwise you may fall into
thousands of lines of source code without knowing where to edit