From 9ff7fcb02dd181c3cfd9f096a62fd091d2edffd0 Mon Sep 17 00:00:00 2001
From: Ulf Wiger <ulf@wiger.net>
Date: Sat, 6 Jun 2026 17:54:17 +0200
Subject: [PATCH] Don't crash if ct_log/2 is called when app not running

---
 src/gm_ctflow.erl | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/gm_ctflow.erl b/src/gm_ctflow.erl
index d1fdf0d..f06209b 100644
--- a/src/gm_ctflow.erl
+++ b/src/gm_ctflow.erl
@@ -61,13 +61,19 @@ ct_log(Flow, Fmt, Args) ->
     TS = timestamp(),
     case Flow of
         undefined ->
-            save_log(undefined, TS, Fmt, Args),
+            maybe_save_log_no_flow(TS, Fmt, Args),
             ct:log(Fmt, Args);
         Flow ->
             save_log(Flow, TS, Fmt, Args),
             ct:log("~p[~w]: " ++ Fmt, [Flow, self()|Args])
     end.
-    
+
+maybe_save_log_no_flow(TS, Fmt, Args) ->
+    try save_log(undefined, TS, Fmt, Args)
+    catch
+        error:_ ->
+            ok
+    end.
 
 save_log(Flow, TS, Fmt, Args) ->
     gm_ctflow_log:log(Flow, TS, Fmt, Args).