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-rw-r--r--compiler/rustc_error_codes/src/error_codes/E0231.md1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0231.md b/compiler/rustc_error_codes/src/error_codes/E0231.md
index 23a0a88ec..a1aaf90df 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0231.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0231.md
@@ -5,6 +5,7 @@ compiled:
```compile_fail,E0231
#![feature(rustc_attrs)]
+#![allow(internal_features)]
#[rustc_on_unimplemented = "error on `{Self}` with params `<{A},{}>`"] // error!
trait BadAnnotation<A> {}