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-rw-r--r--tvix/tracing/src/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/tvix/tracing/src/lib.rs b/tvix/tracing/src/lib.rs
index 41f294cf499a..1305778a3d9a 100644
--- a/tvix/tracing/src/lib.rs
+++ b/tvix/tracing/src/lib.rs
@@ -145,6 +145,7 @@ impl TracingHandle {
     }
 }
 
+#[must_use = "Don't forget to call build() to enable tracing."]
 #[derive(Default)]
 pub struct TracingBuilder {
     progess_bar: bool,