diff --git a/scripts/tools.gd b/scripts/tools.gd
index 1776f557..8330cd5f 100644
--- a/scripts/tools.gd
+++ b/scripts/tools.gd
@@ -29,6 +29,12 @@ func hypot(x: float, y: float) -> float: return sqrt(x * x + y * y)
 func is_overlap(x1, x2, y1, y2) -> bool: return max(x1, y1) <= min(x2, y2)
 
 
+func allways(val: bool, msg: String = '<не указано>'):
+    if val: return
+    push_error('ошибка: %s\n' % msg)
+    get_tree().quit(Error.FAILED)
+
+
 func _check_index(obj, index) -> bool:
     if obj is Dictionary:
         if obj.has(index):