From abe7718e0ba5e9ec38f0144659cdbf004a40d396 Mon Sep 17 00:00:00 2001
From: David Barsky <me@davidbarsky.com>
Date: Sat, 10 Oct 2020 13:26:16 -0400
Subject: [PATCH] add back dropped `alloc` feature

---
 tracing/src/collector.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tracing/src/collector.rs b/tracing/src/collector.rs
index b4bc8582ae..c92dd1fd8e 100644
--- a/tracing/src/collector.rs
+++ b/tracing/src/collector.rs
@@ -36,6 +36,8 @@ where
 /// [span]: ../span/index.html
 /// [`Collector`]: ../collector/trait.Collector.html
 /// [`Event`]: ../event/struct.Event.html
+#[cfg(feature = "alloc")]
+#[cfg_attr(docsrs, doc(cfg(any(feature = "std", feature = "alloc"))))]
 pub fn set_global_default<S>(collector: S) -> Result<(), SetGlobalDefaultError>
 where
     S: Collector + Send + Sync + 'static,