1 files changed, 17 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-51947.rs b/tests/ui/issues/issue-51947.rs
new file mode 100644
index 000000000..c877fb8ae
--- /dev/null
+++ b/tests/ui/issues/issue-51947.rs
@@ -0,0 +1,17 @@
+// build-pass
+
+#![crate_type = "lib"]
+#![feature(linkage)]
+
+// MergeFunctions will merge these via an anonymous internal
+// backing function, which must be named if ThinLTO buffers are used
+
+#[linkage = "weak"]
+pub fn fn1(a: u32, b: u32, c: u32) -> u32 {
+    a + b + c
+}
+
+#[linkage = "weak"]
+pub fn fn2(a: u32, b: u32, c: u32) -> u32 {
+    a + b + c
+}