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-rw-r--r--tests/rustdoc-json/primitives/primitive_impls.rs5
1 files changed, 4 insertions, 1 deletions
diff --git a/tests/rustdoc-json/primitives/primitive_impls.rs b/tests/rustdoc-json/primitives/primitive_impls.rs
index 77d1d68f8e4..58c222ce4f0 100644
--- a/tests/rustdoc-json/primitives/primitive_impls.rs
+++ b/tests/rustdoc-json/primitives/primitive_impls.rs
@@ -1,4 +1,4 @@
-#![feature(no_core)]
+#![feature(no_core, lang_items)]
 #![feature(rustc_attrs)]
 #![feature(rustdoc_internals)]
 #![no_core]
@@ -6,6 +6,9 @@
 
 //@ set impl_i32 = "$.index[*][?(@.docs=='Only core can do this')].id"
 
+#[lang = "sized"]
+trait Sized {}
+
 /// Only core can do this
 impl i32 {
     //@ set identity = "$.index[*][?(@.docs=='Do Nothing')].id"