Why do these tests destroy the context from a callback?

src/context.c

@@ -1390,6 +1390,7 @@ getdns_context_create_with_extended_memory_functions(
 #endif
 	result->processing = 0;
 	result->destroying = 0;
+	result->to_destroy = 0;
 	result->my_mf.mf_arg         = userarg;
 	result->my_mf.mf.ext.malloc  = malloc;
 	result->my_mf.mf.ext.realloc = realloc;
@@ -1644,6 +1645,10 @@ getdns_context_destroy(struct getdns_context *context)
 
 	/*  If being destroyed during getdns callback, fail via assert */
 	assert(context->processing == 0);
+	if (context->processing == 1) {
+		context->to_destroy = 1;
+		return;
+	}
 	if (context->destroying)
 		return;
 
@@ -3768,7 +3773,10 @@ getdns_context_get_num_pending_requests(const getdns_context* context,
 
 	if (context->outbound_requests.count)
 		context->extension->vmt->run_once(context->extension, 0);
-
+	if (context->to_destroy) {
+		getdns_context_destroy((getdns_context *)context);
+		return 0;
+	}
 	return context->outbound_requests.count;
 }
 
@@ -3780,6 +3788,8 @@ getdns_context_process_async(getdns_context *context)
 		return GETDNS_RETURN_INVALID_PARAMETER;
 
 	context->extension->vmt->run_once(context->extension, 0);
+	if (context->to_destroy)
+		getdns_context_destroy(context);
 	return GETDNS_RETURN_GOOD;
 }
 
@@ -3787,6 +3797,8 @@ void
 getdns_context_run(getdns_context *context)
 {
 	context->extension->vmt->run(context->extension);
+	if (context->to_destroy)
+		getdns_context_destroy(context);
 }
 
 getdns_return_t

src/context.h

@@ -397,6 +397,7 @@ struct getdns_context {
 
 	int processing;
 	int destroying;
+	int to_destroy;
 
 	struct mem_funcs mf;
 	struct mem_funcs my_mf;

src/test/check_getdns_common.c

@@ -343,6 +343,7 @@ void assert_ptr_in_answer(struct extracted_response *ex_response)
   ck_assert_msg(ptr_records > 0, "Answer did not contain any PTR records");
 }
 
+int context_destroyed = 0;
 void destroy_callbackfn(struct getdns_context *context,
                         getdns_callback_type_t callback_type,
                         struct getdns_dict *response,
@@ -353,6 +354,7 @@ void destroy_callbackfn(struct getdns_context *context,
     *flag = 1;
     getdns_dict_destroy(response);
     getdns_context_destroy(context);
+    context_destroyed = 1;
 }
 
 /*

src/test/check_getdns_context_destroy.h

@@ -28,6 +28,7 @@
 #define _check_getdns_context_destroy_h_
 
 #include <signal.h>
+extern int context_destroyed;
 
     /*
      **************************************************************************
@@ -202,10 +203,12 @@
          &flag, &transaction_id, destroy_callbackfn),
          GETDNS_RETURN_GOOD, "Return code from getdns_address()");
 
+       context_destroyed = 0;
        RUN_EVENT_LOOP;
 
+       if (!context_destroyed) {
          CONTEXT_DESTROY;
-
+       }
        ck_assert_msg(flag == 1, "flag should == 1, got %d", flag);
      }
      END_TEST
@@ -229,10 +232,11 @@
          &flag, &transaction_id, destroy_callbackfn),
          GETDNS_RETURN_GOOD, "Return code from getdns_address()");
        getdns_cancel_callback(context, transaction_id);
+       context_destroyed = 0;
        RUN_EVENT_LOOP;
-
+       if (!context_destroyed) {
          CONTEXT_DESTROY;
-
+       }
        ck_assert_msg(flag == 1, "flag should == 1, got %d", flag);
      }
      END_TEST
@@ -261,10 +265,12 @@
          &flag, &transaction_id, destroy_callbackfn),
          GETDNS_RETURN_GOOD, "Return code from getdns_address()");
 
+       context_destroyed = 0;
        RUN_EVENT_LOOP;
 
+       if (!context_destroyed) {
          CONTEXT_DESTROY;
-
+       }
        ck_assert_msg(flag == 1, "flag should == 1, got %d", flag);
      }
      END_TEST