On 12/9/14 12:40 PM, Ruslan Mullakhmetov wrote:
On Tuesday, 9 December 2014 at 16:13:25 UTC, Dicebot wrote:
It may happen if only reference to an object is stored in memory block
marked as data-only (using ubyte[] for a buffer is probably most
common reason I have encountered)

Thanks for interesting hypothesis, but that's not the issue.

innocent though collected objects are living in D array MyClass[] which
are living in assoc array as value.

i checked attributes for GC block holding this array:

```
FINALIZE NO_SCAN NO_MOVE APPENDABLE NO_INTERIOR
```


That does not sound right at all. No block should ever have both FINALIZE (reserved for objects only) and APPENDABLE (reserved for arrays only).

I really doubting about NO_INTERIOR. can anybody confirm me that is's
working with array slicing which i heavily use?


also i found that block size is quite small

<pre>
                 array: [100A2FD00, 100A2F700, 100A33B80, 100A33500,
100A3FE80, 100A3F980, 100A3F400, 100A72600, 100A7DF80, 100A7DA80,
100A7D500]
         array ptr: 100A72580 root: 100A72580:128 attr: FINALIZE NO_SCAN
NO_MOVE APPENDABLE NO_INTERIOR
         [100985A00] keys: [1] as: 1 au: 100A2FD00
         [100985A00] keys: [1] as: 1 au: 100A2F700
         [100985A00] keys: [1] as: 1 au: 100A33B80
</pre>

array holds 11 64bit pointers but it's block size is only 128 bytes < 11
* 64 = 704 bytes. what's wrong with this arithmetics?


I think there is something you are missing, or something is very corrupt. Can you show the code that prints this?

-Steve

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