add compile-fail tests; test only on nightly

we'll test on beta when 1.30-beta is out

1 files changed, 22 insertions, 0 deletions

diff --git a/cortex-m-rt/tests/compile-fail/exception-hidden.rs b/cortex-m-rt/tests/compile-fail/exception-hidden.rs
new file mode 100644
index 0000000..053c81c
--- /dev/null
+++ b/cortex-m-rt/tests/compile-fail/exception-hidden.rs
@@ -0,0 +1,22 @@
+// 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_semihosting;
+
+use cortex_m_rt::{entry, exception};
+
+#[entry]
+fn foo() -> ! {
+    loop {}
+}
+
+mod hidden {
+    use cortex_m_rt::exception;
+
+    #[exception]
+    fn SysTick() {}
+}