From 46b410c60dca17e77ff76a87900955b4ef20f120 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ryd=C3=A9n=20Johan?= <johan.ryden@bostad.uppsala.se>
Date: Fri, 17 Jul 2026 14:15:59 +0200
Subject: [PATCH] timer: ignore cancelled timers without samples

---
 tests/test_timer.py | 13 +++++++++++++
 toolkit/timer.py    |  2 ++
 2 files changed, 15 insertions(+)
 create mode 100644 tests/test_timer.py

diff --git a/tests/test_timer.py b/tests/test_timer.py
new file mode 100644
index 00000000..7f4945ec
--- /dev/null
+++ b/tests/test_timer.py
@@ -0,0 +1,13 @@
+from toolkit.timer import Timer
+
+
+def test_print_ignores_cancelled_timer_without_samples():
+    timer = Timer()
+    printed_timings = []
+    timer.add_after_print_hook(printed_timings.append)
+
+    timer.start("cancelled")
+    timer.cancel("cancelled")
+    timer.print()
+
+    assert printed_timings == [{}]
diff --git a/toolkit/timer.py b/toolkit/timer.py
index e849ba5f..09779dc8 100644
--- a/toolkit/timer.py
+++ b/toolkit/timer.py
@@ -48,6 +48,8 @@ class Timer:
         timing_dict = {}
         # sort by longest at top
         for timer_name, timings in sorted(self.timers.items(), key=lambda x: sum(x[1]), reverse=True):
+            if not timings:
+                continue
             avg_time = sum(timings) / len(timings)
             
             if not is_ui: