1 files changed, 5 insertions, 0 deletions
diff --git a/server.c b/server.c
index 09bd36b..c3b594b 100644
--- a/server.c
+++ b/server.c
@@ -249,6 +249,11 @@ static bool clientMove(struct Client *client, int8_t dx, int8_t dy) {
     if (client->tileY == TILE_ROWS)  client->tileY = 0;
     if (client->tileY == UINT32_MAX) client->tileY = TILE_ROWS - 1;
 
+    assert(client->cellX < CELL_COLS);
+    assert(client->cellY < CELL_ROWS);
+    assert(client->tileX < TILE_COLS);
+    assert(client->tileY < TILE_ROWS);
+
     return clientUpdate(client, &old);
 }