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digitalmars.D.bugs - [Issue 5683] New: Calling .clear on a fresh associative array causes subsequent segfault

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=5683

           Summary: Calling .clear on a fresh associative array causes
                    subsequent segfault
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: Marco.Leise gmx.de


--- Comment #0 from Marco Leise <Marco.Leise gmx.de> 2011-03-02 14:52:05 PST ---
In DMD 2.051 and 2.052 the following code doesn't run:

void main() {
  int[char] test;
  test.clear;     // <- this provokes the bug
  test['x'] = 42;
}

This happens independently of the key type (int, char, struct). It seems like
associative arrays are not in the 'clear' state when they are created.
A typical use case is a field of a class that gets filled with values by a
method that needs to clear out old content if any. I considered this a major
bug, because it happens with a core feature.

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=5683


Iain Buclaw <ibuclaw ubuntu.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ibuclaw ubuntu.com


--- Comment #1 from Iain Buclaw <ibuclaw ubuntu.com> 2011-04-04 12:15:29 PDT ---
This is a horrible bug with .init, and nothing to do with .clear.

Same code but without the external call:

void main() {
  int[char] test;
  test = typeof(test).init;
  test['x'] = 42;
}

What seems to be happening is that the address of the constructor is being
assigned (ie: test = &test_init) when it should *really* be a direct
assignment.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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dawg dawgfoto.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ratchet.freak gmail.com


--- Comment #2 from dawg dawgfoto.de 2011-07-19 09:21:33 PDT ---
*** Issue 5816 has been marked as a duplicate of this issue. ***

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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dawg dawgfoto.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dawg dawgfoto.de


--- Comment #3 from dawg dawgfoto.de 2011-07-19 12:54:13 PDT ---
A quickfix if urgently needed by anybody is to add a static init method to the
template AA structure.

struct AssociativeArray(Key, Value)
{
    static Value[Key] init()  property
    {
        void* p;
        return *cast(Value[Key]*)(&p);
    }
}

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dawg dawgfoto.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE


--- Comment #4 from dawg dawgfoto.de 2011-08-04 02:19:06 PDT ---
*** This issue has been marked as a duplicate of issue 6433 ***

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