1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/lint/dead-code/with-core-crate.rs b/src/test/ui/lint/dead-code/with-core-crate.rs
new file mode 100644
index 000000000..0a94b528f
--- /dev/null
+++ b/src/test/ui/lint/dead-code/with-core-crate.rs
@@ -0,0 +1,18 @@
+#![deny(dead_code)]
+#![allow(unreachable_code)]
+
+#[macro_use]
+extern crate core;
+
+fn foo() { //~ ERROR function `foo` is never used
+
+    // none of these should have any dead_code exposed to the user
+    panic!();
+
+    panic!("foo");
+
+    panic!("bar {}", "baz")
+}
+
+
+fn main() {}