From b09835a5d11f0296b417d5ad98ed5568d043d687 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20K=C4=99pie=C5=84?= <michal@isc.org>
Date: Tue, 19 Dec 2023 11:10:04 +0100
Subject: [PATCH] Ensure wait_for_line() is not called with timeout=0

(cherry picked from commit 1770b370959874d0ea51f00249fda8c92a26d765)
---
 bin/tests/system/isctest/log.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/bin/tests/system/isctest/log.py b/bin/tests/system/isctest/log.py
index 38c1143821..8a382626c0 100644
--- a/bin/tests/system/isctest/log.py
+++ b/bin/tests/system/isctest/log.py
@@ -227,6 +227,7 @@ class WatchLog(abc.ABC):
         if not self._fd:
             raise WatchLogException("No file to watch")
         leftover = ""
+        assert timeout, "Do not use this class unless you want to WAIT for something."
         deadline = time.time() + timeout
         while time.time() < deadline:
             for line in self._fd.readlines():