Rollup merge of #41141 - michaelwoerister:direct-metadata-ich-final, r=nikomatsakis

[rust.git] / src / librustc_data_structures / stable_hasher.rs

diff --git a/src/librustc_data_structures/stable_hasher.rs b/src/librustc_data_structures/stable_hasher.rs
index dc412a0763ef70f196eed9134bfa930f21a40570..95f063976d491018a44cc55c149d40dec931a1ed 100644 (file)
--- a/src/librustc_data_structures/stable_hasher.rs
+++ b/src/librustc_data_structures/stable_hasher.rs
@@ -40,13 +40,18 @@
 /// This hasher currently always uses the stable Blake2b algorithm
 /// and allows for variable output lengths through its type
 /// parameter.
-#[derive(Debug)]
 pub struct StableHasher<W> {
     state: Blake2bHasher,
     bytes_hashed: u64,
     width: PhantomData<W>,
 }
 
+impl<W: StableHasherResult> ::std::fmt::Debug for StableHasher<W> {
+    fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+        write!(f, "{:?}", self.state)
+    }
+}
+
 pub trait StableHasherResult: Sized {
     fn finish(hasher: StableHasher<Self>) -> Self;
 }