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-rw-r--r--go/ui/collection.go2
1 files changed, 1 insertions, 1 deletions
diff --git a/go/ui/collection.go b/go/ui/collection.go
index e2b3ffa8..03920f34 100644
--- a/go/ui/collection.go
+++ b/go/ui/collection.go
@@ -35,7 +35,7 @@ func (c *Collection) AddWidget(w Widget) {
log.Panicf("Adding nil widget to collection")
}
if slices.Contains(c.widgets, w) {
- log.Panicf("Double insertion of", w)
+ log.Panicf("Double insertion of %v", w)
}
c.widgets = append(c.widgets, w)
}