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-rw-r--r--src/libsyntax/ext/base.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index 4881170c1d1..7eeafa72c68 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -608,7 +608,7 @@ pub trait Resolver {
     fn check_unused_macros(&self);
 }
 
-#[derive(Copy, Clone, Debug)]
+#[derive(Copy, Clone, Debug, PartialEq)]
 pub enum Determinacy {
     Determined,
     Undetermined,