• d-bugmail puremagic.com Jun 20 2011
• d-bugmail puremagic.com Jun 26 2011
• d-bugmail puremagic.com Jun 26 2011
• d-bugmail puremagic.com Jul 09 2012

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=6186

           Summary: Struct destructor is not called on out parameter
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: k.hara.pg gmail.com


--- Comment #0 from Kenji Hara <k.hara.pg gmail.com> 2011-06-20 18:26:25 PDT ---
An object typed T through out parameter is initialized by T.init (like memcpy),
but its destructor is not called before initializing.

----
int dtor_cnt;
struct S
{
    int n;
    ~this(){ dtor_cnt++; }
}
void test1()
{
    void f1(out S s){}

    S s = S(1);
    dtor_cnt = 0;
    f1(s);
    assert(dtor_cnt == 1);  // NG
}
void test2()
{
    void f2(out S[2] sa){}

    S[2] sa = [S(1), S(2)];
    dtor_cnt = 0;
    f2(sa);
    assert(dtor_cnt == 2);  // NG
}
void main()
{
    test1();
    test2();
}
----

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=6186


Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugzilla digitalmars.com


--- Comment #1 from Walter Bright <bugzilla digitalmars.com> 2011-06-26
17:28:44 PDT ---
I'm unsure what the right fix is for this.

Out variables are supposed to be initialized by the function, not assigned.
Hence, I think uninitialized variables should be passed to them, and it should
be an error to pass a non-default-initialized variable.

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=6186



--- Comment #2 from Walter Bright <bugzilla digitalmars.com> 2011-06-26
17:29:25 PDT ---
See also:

https://github.com/D-Programming-Language/dmd/pull/155

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=6186


Benjamin Thaut <code benjamin-thaut.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |code benjamin-thaut.de


--- Comment #3 from Benjamin Thaut <code benjamin-thaut.de> 2012-07-09 09:22:23
PDT ---
Why is the github merge request closed? This issue is not fixed yet and the
current behaviour leads to really strange bugs...

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