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-rw-r--r--compiler/rustc_data_structures/src/profiling.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_data_structures/src/profiling.rs b/compiler/rustc_data_structures/src/profiling.rs
index 2569684df3f..c6d51a5d6b4 100644
--- a/compiler/rustc_data_structures/src/profiling.rs
+++ b/compiler/rustc_data_structures/src/profiling.rs
@@ -99,6 +99,7 @@ pub use measureme::EventId;
 use measureme::{EventIdBuilder, Profiler, SerializableString, StringId};
 use parking_lot::RwLock;
 use smallvec::SmallVec;
+use tracing::warn;
 
 bitflags::bitflags! {
     #[derive(Clone, Copy)]