Need some help with this...

[Bane]

Following code will freeze app on std.gc.fullCollect(), when sqlite3_close() in destructor is called. If destructor is called manualy, everything goes ok.

Is it a bug, and if is, with what? It behaves same on winxp64 and centos5.2 using dmd 1.30 and sqlite 3.6.5 or 3.6.19 statically import lib. Libraries are tested so I do not suspect problem lies in them (they are compiled with dmc/gcc using full threading support).

Is this some problem with GC or, more likely, my knowledge? I would appreciate some clarification, this thing took me a lot of hours to track.

Thanks, 
Bane

==========================================


import std.stdio;
import std.gc;
import std.string;
import std.thread;

pragma(lib, "sqlite3.lib");
const int SQLITE_OK = 0;	// Successful result.
struct sqlite3 {}
extern(C) int sqlite3_open (char* filename, sqlite3** database);
extern(C) int sqlite3_close(sqlite3* database);

class SQLite {
  sqlite3* h;
  this(){
    assert(sqlite3_open(toStringz(":memory:"), &h) == SQLITE_OK);
  }
  ~this(){
    writefln("~this start"); // to help debug
    assert(sqlite3_close(h) == SQLITE_OK);
    writefln("~this stop"); // to help debug
  }
}

class T : Thread {
  int run(){
    SQLite s = new SQLite;
    // if next line is uncommented then app wont freeze
    // delete s;
    return 0;
  }
}

void main(){
  while(true){
    T t = new T;
    t.start;
    writefln(Thread.nthreads);
    if(Thread.nthreads > 10)
      fullCollect; // this will freeze app
  }
}