1 files changed, 22 insertions, 0 deletions
diff --git a/cortex-m-rt/tests/compile-fail/default-handler-twice.rs b/cortex-m-rt/tests/compile-fail/default-handler-twice.rs
new file mode 100644
index 0000000..bbf2edd
--- /dev/null
+++ b/cortex-m-rt/tests/compile-fail/default-handler-twice.rs
@@ -0,0 +1,22 @@
+#![no_main]
+#![no_std]
+
+extern crate cortex_m_rt;
+extern crate panic_halt;
+
+use cortex_m_rt::{entry, exception};
+
+#[entry]
+fn foo() -> ! {
+    loop {}
+}
+
+#[exception]
+unsafe fn DefaultHandler(_irqn: i16) {}
+
+pub mod reachable {
+    use cortex_m_rt::exception;
+
+    #[exception] //~ ERROR symbol `DefaultHandler` is already defined
+    unsafe fn DefaultHandler(_irqn: i16) {}
+}