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-rw-r--r--src/librustdoc/doctree.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/librustdoc/doctree.rs b/src/librustdoc/doctree.rs
index 430236f30c4..413e5623118 100644
--- a/src/librustdoc/doctree.rs
+++ b/src/librustdoc/doctree.rs
@@ -210,6 +210,7 @@ pub struct Trait {
     pub depr: Option<attr::Deprecation>,
 }
 
+#[derive(Debug)]
 pub struct Impl {
     pub unsafety: hir::Unsafety,
     pub polarity: hir::ImplPolarity,