1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/compile-fail-migration/duplicate_entry_error.rs b/src/test/ui/compile-fail-migration/duplicate_entry_error.rs
new file mode 100644
index 00000000000..176aa7cca53
--- /dev/null
+++ b/src/test/ui/compile-fail-migration/duplicate_entry_error.rs
@@ -0,0 +1,25 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// note-pattern: first defined in crate `std`.
+
+// Test for issue #31788 and E0152
+
+#![feature(lang_items)]
+
+use std::panic::PanicInfo;
+
+#[lang = "panic_impl"]
+fn panic_impl(info: &PanicInfo) -> ! {
+//~^ ERROR: duplicate lang item found: `panic_impl`.
+    loop {}
+}
+
+fn main() {}