From: Pierre-Emmanuel Patry <[email protected]>

We recently modified all tests with lang items to add the lang feature
gate switch but we did not introduce any test to check that a proper
error message is printed when this switch is not used.

gcc/testsuite/ChangeLog:

        * rust/compile/lang_feature_gate.rs: New test.

Signed-off-by: Pierre-Emmanuel Patry <[email protected]>
---
 gcc/testsuite/rust/compile/lang_feature_gate.rs | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 gcc/testsuite/rust/compile/lang_feature_gate.rs

diff --git a/gcc/testsuite/rust/compile/lang_feature_gate.rs 
b/gcc/testsuite/rust/compile/lang_feature_gate.rs
new file mode 100644
index 00000000000..4cd485ec6ea
--- /dev/null
+++ b/gcc/testsuite/rust/compile/lang_feature_gate.rs
@@ -0,0 +1,2 @@
+#[lang = "sized"] // { dg-error "lang items are subject to change. add 
.#!.feature.lang_items... to the crate attributes to enable" }
+pub trait Sized {}
-- 
2.50.1

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