Tons of bugfixes (lots with closures). Added safe_recursive_delete to mem which helps easily and safely delete recursive data structures, and used it in regex. It still has a leak, but it's a lot better than before.

tests/test_close_over_members.krak

@@ -1,4 +1,6 @@
 import io:*
+import set
+import mem
 
 fun runFunc(func: fun():void) {
     func()
@@ -18,10 +20,23 @@ obj ToClose {
     }
 }
 
+obj One (Object) {
+    fun construct(): One* {
+        return this
+    }
+    fun destruct() {
+        var a:One
+        mem::safe_recursive_delete(&a, fun(it: One*): set::set<One*> { return set::set(it); } )
+    }
+}
+
+
 fun main():int {
     var it: ToClose
     it.testMethod()
     it.testVariable()
+    //var a = 7
+    //mem::safe_recursive_delete(&a, fun(it: int*): set::set<int*> { return set::set(it); } )
     return 0
 }