1 files changed, 15 insertions, 0 deletions
diff --git a/src/date.cpp b/src/date.cpp
index 23354cde1..24888177b 100644
--- a/src/date.cpp
+++ b/src/date.cpp
@@ -267,6 +267,21 @@ void IncreaseDate()
 	/* yes, call various monthly loops */
 	if (_game_mode != GM_MENU) {
 #ifdef DEBUG_DUMP_COMMANDS
+		int data[MAX_PLAYERS][TOTAL_NUM_ENGINES + 1];
+		memset(data, 0, sizeof(data));
+
+		const Vehicle *v;
+		FOR_ALL_VEHICLES(v) {
+			if (!IsEngineCountable(v)) continue;
+			data[v->owner][v->engine_type]++;
+		}
+
+		for (PlayerID i = PLAYER_FIRST; i < MAX_PLAYERS; i++) {
+			const Player *p = GetPlayer(i);
+			if (!p->is_active) continue;
+			for (int j = 0; j < TOTAL_NUM_ENGINES; j++) assert(data[i][j] == p->num_engines[j]);
+		}
+
 		char name[MAX_PATH];
 		snprintf(name, lengthof(name), "dmp_cmds_%d.sav", _date);
 		SaveOrLoad(name, SL_SAVE, AUTOSAVE_DIR);