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-rw-r--r--compiler/rustc_error_codes/src/error_codes/E0391.md3
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0391.md b/compiler/rustc_error_codes/src/error_codes/E0391.md
index dff50ccaa0b..457fbd002a1 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0391.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0391.md
@@ -14,3 +14,6 @@ trait SecondTrait : FirstTrait {
 
 The previous example contains a circular dependency between two traits:
 `FirstTrait` depends on `SecondTrait` which itself depends on `FirstTrait`.
+
+See https://rustc-dev-guide.rust-lang.org/overview.html#queries and
+https://rustc-dev-guide.rust-lang.org/query.html for more information.