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-rw-r--r--compiler/rustc_middle/src/infer/canonical.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/infer/canonical.rs b/compiler/rustc_middle/src/infer/canonical.rs
index cc83010580f..654ec022b60 100644
--- a/compiler/rustc_middle/src/infer/canonical.rs
+++ b/compiler/rustc_middle/src/infer/canonical.rs
@@ -180,7 +180,7 @@ pub struct QueryResponse<'tcx, R> {
     pub certainty: Certainty,
     /// List of opaque types for which we figured out a hidden type
     /// during the evaluation of the query.
-    pub opaque_types: Vec<(OpaqueTypeKey<'tcx>, Vec<Ty<'tcx>>)>,
+    pub opaque_types: Vec<(OpaqueTypeKey<'tcx>, Ty<'tcx>)>,
     pub value: R,
 }