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From: "lisp2d at lisp2d dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/61528] New: std::min std::max and RValue
Date: Mon, 16 Jun 2014 17:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61528

            Bug ID: 61528
           Summary: std::min std::max and RValue
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: lisp2d at lisp2d dot net

Declaring reference of result of functions MIN or MAX we get a DEAD memory when
one of arguments is an RValue.

// gcc -std=c++11 -Os bug.cpp
// gcc -std=c++11 -O2 bug.cpp
#include<iostream>

void  f(size_t  const & x){
  std::cout <<  "f:x="  <<  x <<  std::endl;}

int main(void){
  size_t  x{1};
  size_t  y{2};
  size_t  z{4};
  size_t  const & i=std::min(z,x  + y);
  f(i);
  size_t  const & a=std::max(x,y  + z);
  f(a);}