How to free memory allocated via double[][] using dmd-2.0.12?

[Markus Dittrich]

Hi,

For a data processing application I need to read a large number
of data sets from disk. Due to their size, they have to be read and 
processed sequentially, i.e. in pseudocode

int main()
{
    while (some condition)
    {
         double[][] myLargeDataset = read_data();
         process_data(myLargeDataset);
         // free all memory here otherwise next cycle will 
         // run out of memory
     }
    
   return 0;
}

Now, the "problem" is the fact that each single data-set saturates
system memory and hence I need to make sure that all memory
is freed after each process_data step is complete. Unfortunately,
using dmd-2.012 I have not been able to achieve this. Whatever
I do (including nothing, i.e., letting the GC do its job), the resulting 
binary keeps accumulating memory and crashing shortly after). 
I've tried deleting the array, setting the array lengths to 0, and manually
forcing the GC to collect, to no avail. Hence, is there something I am 
doing terribly wrong or is this a bug in dmd?

Thanks much,
Markus