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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67358] const makes the code behavior changes
Date: Wed, 26 Aug 2015 09:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67358

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> ---
Not a bug, that's how C++ works.

The argument p is a non-const int, so binding const int& requires a
qualification conversion. The function template deduces the parameter type as
int& which is an exact match requiring no conversion, so is a better conversion
sequence.

I suggest asking this kind of question somewhere like stackoverflow.com instead
of reporting a bug.