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Date:      Sat, 18 Feb 2017 13:59:33 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 217200] std::make_shared does not perform zero initialization
Message-ID:  <bug-217200-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D217200

            Bug ID: 217200
           Summary: std::make_shared does not perform zero initialization
           Product: Base System
           Version: 10.3-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: dim@FreeBSD.org

>From https://bugs.llvm.org/show_bug.cgi?id=3D32002:

On FreeBSD 10.3, the following program displays "123", but "0" is expected:

#include <memory>
#include <iostream>

int main()
{
    std::make_shared<int>(123);
    std::cout << *std::make_shared<int>();
    return 0;
}

The second std::make_shared reuses the piece of memory of the first one. Bu=
t it
should initialize it to zero, as if "new (ptr) int()" is called, where ptr =
is
the address of allocated memory.

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