stacktrace for InvalidMemoryOperationError

[crimaniak via Digitalmars-d-learn]

On Saturday, 15 July 2017 at 18:14:13 UTC, Joakim wrote:
>> core.exception.InvalidMemoryOperationError at src/core/exception.d(696): Invalid memory operation
...
> See the wiki page about this:
>
> https://wiki.dlang.org/InvalidMemoryOperationError
>
> If you can't do all that, look for places you might be 
> allocating in a destructor.  The recent GC allocation flag -vgc 
> might help:
>
> https://dlang.org/blog/2017/06/16/life-in-the-fast-lane/

Yes, I found it already and make documentation proposition about 
https://issues.dlang.org/show_bug.cgi?id=17642
Then it turned out that it was more difficult to avoid this 
problem than to find the cause. Yes, I have a heavy cleanup in 
the destructor and I can't definitely make this cleanup @nogc. So 
first I tried to make problematic object instances RefCounted. In 
my case, it means change ClientController[string] to 
RefCounted!ClientController[string] and create an object by lib 
interface, not by new. I have to change ClientController from 
object to struct because automem can't work with the object. I 
hunted all extra copies of these objects and kill them all, so 
now I sure there are no copies except the main container. I tried 
different libraries from std.typecons.RefCounted to automem. And 
I fail to make it _really_ reference counted. It's not deleted 
when I delete it from the container. Every time it's collected by 
GC and application is dropped. So I decided that in the container 
itself. Obviously, the associative array does not delete the 
elements themselves on demand, but loses them and gives them to 
the garbage collector.
I didn't find any map or multimap @nogc container so I make the 
ugly solution: I move all destruction to method destructMe() and 
in ~this() now is just assert(destructMeIsCalled). And now I have 
to call manually destructMe() before object removing. It seems it 
works. I'm wondering if there is a less ugly way to have the map 
of reference counted objects.