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digitalmars.D.bugs - [Issue 11060] New: delete gives InvalidMemoryOperationError

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11060

           Summary: delete gives InvalidMemoryOperationError
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: thelastmammoth gmail.com



class B{
  int*a;
  this(){
    a=new int;
  }
  ~this(){
    version(A1)
      delete a;//core.exception.InvalidMemoryOperationError ; even though
http://dlang.org/deprecate.html#delete doesn't list as deprecated yet
    version(A2)
      a.clear;//works even though docs recommends DEPRECATED 'Scheduled for
deprecation in December 2012. Please use destroy instead of clear.'; and should
appear in http://dlang.org/deprecate.html#delete
    version(A3)
      a.destroy;//OK
  }
}

void main(){
  auto a=new B;
}

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11060


Maxim Fomin <maxim maxim-fomin.ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |maxim maxim-fomin.ru
         Resolution|                            |INVALID



---
Please read the spec.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11060






 Please read the spec.


It would be helpful if you could be more specific.


* as I wrote in the bug report, why is 'clear' not deprecated even though spec
says it should be by december 2012? (and it's also in several phobos modules)

* according to http://dlang.org/memory.html, 'If there is a delete(), there
should be a corresponding new()'
In my example, there is no new() function, so why does it even compile?

* according to Jonathan Davis (see email "allocate array with new"): "No.
_Never_ use delete. It's going to be deprecated". 

* in http://dlang.org/deprecate.html#delete, it says delete will be deprecated
at a later time.

* a number of phobos modules use delete.

So all in all the spec is not very clear to me, and maybe to others as well.

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prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11060




---
This was discussed really plenty of times - current garbage collector is not
reenterable. So, if GC during garbage collection calls destructor, you cannot
invoke any operation which directly or indirectly calls the GC.

Clear() and destroy() work because they don't call the GC.

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