Add tokio_unstable_assertion to make cfg assertion optional

tokio-rs · Jul 7, 2023 · 0e6d4cf · 0e6d4cf
1 parent 7c8e80a
commit 0e6d4cf
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Showing 2 changed files with 3 additions and 1 deletion.
diff --git a/console-subscriber/Cargo.toml b/console-subscriber/Cargo.toml
@@ -25,9 +25,10 @@ keywords = [
 ]
 
 [features]
-default = ["env-filter"]
+default = ["env-filter", "tokio_unstable_assertion"]
 parking_lot = ["parking_lot_crate", "tracing-subscriber/parking_lot"]
 env-filter = ["tracing-subscriber/env-filter"]
+tokio_unstable_assertion = []
 
 [dependencies]
 

diff --git a/console-subscriber/src/lib.rs b/console-subscriber/src/lib.rs
@@ -263,6 +263,7 @@ impl ConsoleLayer {
         // The `cfg` value *appears* to be a constant to clippy, but it changes
         // depending on the build-time configuration...
         #![allow(clippy::assertions_on_constants)]
+        #[cfg(feature = "tokio_unstable_assertion")]
         assert!(
             cfg!(tokio_unstable),
             "task tracing requires Tokio to be built with RUSTFLAGS=\"--cfg tokio_unstable\"!"