1 files changed, 19 insertions, 0 deletions
diff --git a/cortex-m-rt/tests/compile-fail/entry-hidden.rs b/cortex-m-rt/tests/compile-fail/entry-hidden.rs
new file mode 100644
index 0000000..836db0d
--- /dev/null
+++ b/cortex-m-rt/tests/compile-fail/entry-hidden.rs
@@ -0,0 +1,19 @@
+// ignore-test :sadface: it's not possible to prevent this user error at compile time
+// see rust-lang/rust#53975 for details
+
+#![no_main]
+#![no_std]
+
+extern crate cortex_m_rt;
+extern crate panic_halt;
+
+mod hidden {
+    use cortex_m_rt::entry;
+
+    // this function needs to be "reachable" (all modules between it and the crate root must be
+    // `pub`) or linking will fail
+    #[entry]
+    fn foo() -> ! { //~ ERROR function is never used
+        loop {}
+    }
+}