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-rw-r--r--compiler/rustc_middle/src/ty/generics.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/ty/generics.rs b/compiler/rustc_middle/src/ty/generics.rs
index 5b0b56933ec..5fff840c39e 100644
--- a/compiler/rustc_middle/src/ty/generics.rs
+++ b/compiler/rustc_middle/src/ty/generics.rs
@@ -230,6 +230,8 @@ impl<'tcx> Generics {
 
     /// Returns the substs corresponding to the generic parameters
     /// of this item, excluding `Self`.
+    ///
+    /// **This should only be used for diagnostics purposes.**
     pub fn own_substs_no_defaults(
         &'tcx self,
         tcx: TyCtxt<'tcx>,
@@ -261,6 +263,8 @@ impl<'tcx> Generics {
     }
 
     /// Returns the substs corresponding to the generic parameters of this item, excluding `Self`.
+    ///
+    /// **This should only be used for diagnostics purposes.**
     pub fn own_substs(
         &'tcx self,
         substs: &'tcx [ty::GenericArg<'tcx>],