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digitalmars.D.bugs - [Issue 7892] New: Compiler-generated struct copies can result in errors when ctor is disable'd

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=7892

           Summary: Compiler-generated struct copies can result in errors
                    when ctor is  disable'd
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: xtzgzorex gmail.com


--- Comment #0 from Alex Rønne Petersen <xtzgzorex gmail.com> 2012-04-11
19:24:34 PDT ---
Two such cases:



alexrp alexrp ~/Projects/tests $ cat test.d
struct S
{
     disable this();

    this(int x) {}
}

void main()
{
    S f()
    out (result)
    {
    }
    body
    {
        return S(1);
    }
}
alexrp alexrp ~/Projects/tests $ dmd test.d
test.d(12): Error: variable test.main.f.result initializer required for type
const(S)



alexrp alexrp ~/Projects/tests $ cat test2.d
struct S
{
     disable this();

    this(int x) {}
}

interface I
{
    S f();
}

class C
{
    invariant()
    {
    }

    S f()
    {
        return S(1);
    }
}

void main()
{
}
alexrp alexrp ~/Projects/tests $ dmd test2.d
test2.d(19): Error: variable test2.C.f.__result initializer required for type S



I bet more can be uncovered, but these are the only ones I've run into.

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next sibling parent d-bugmail puremagic.com writes:
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--- Comment #1 from Alex Rønne Petersen <xtzgzorex gmail.com> 2012-04-11
19:26:33 PDT ---
OK, the first one is probably not due to an invisible copy, but rather just a
bug in the assignment analysis (it follows that if the function returns
properly, it must have returned a proper S instance, so the error is wrong).

The second case is only caused when C has an invariant, since the result of
every function is then stored in a temporary in order to call the invariant
before exiting the function.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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Kenji Hara <k.hara.pg gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |pull, rejects-valid


--- Comment #2 from Kenji Hara <k.hara.pg gmail.com> 2013-09-28 23:06:13 PDT ---
https://github.com/D-Programming-Language/dmd/pull/2596

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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--- Comment #3 from github-bugzilla puremagic.com 2013-09-30 04:33:03 PDT ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/1c42160f643ba3e0fc0d4fbaa24a8d357ae24965
fix Issue 7892 - Compiler-generated struct copies can result in errors when
ctor is  disable'd

https://github.com/D-Programming-Language/dmd/commit/055fc646bb9aeba96c73c6b6e67d601b1f5d8910
Merge pull request #2596 from 9rnsr/fix7892

Issue 7892 - Compiler-generated struct copies can result in errors when ctor is
 disable'd

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Sep 30 2013
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=7892


Andrej Mitrovic <andrej.mitrovich gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |andrej.mitrovich gmail.com
         Resolution|                            |FIXED


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