struct MemoryBlockInfo
{
  size_t size;
  long[10] backtrace;
  int backtraceSize;

  this(size_t size)
  {
    this.size = size;
  }
}

int main(string[] argv)
{
  MemoryBlockInfo info;
  info = MemoryBlockInfo.init; //array allocation here
} 

This allocation seems totaly unneccesary. Also TypeInfo.init should return a immutable(void)[] instead of a void[] as it seems totaly illogical to modify the data retreived by TypeInfo.init.

This is especially critical when working without a GC because one is not able to free the allocated memory for the array as the allocation gets generated by the compiler.