add compile-fail tests; test only on nightly

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

1 files changed, 18 insertions, 0 deletions

diff --git a/cortex-m-rt/tests/compile-fail/pre-init-twice.rs b/cortex-m-rt/tests/compile-fail/pre-init-twice.rs
new file mode 100644
index 0000000..5fb1ade
--- /dev/null
+++ b/cortex-m-rt/tests/compile-fail/pre-init-twice.rs
@@ -0,0 +1,18 @@
+#![no_main]
+#![no_std]
+
+extern crate cortex_m_rt;
+extern crate panic_semihosting;
+
+use cortex_m_rt::{entry, pre_init};
+
+#[pre_init]
+unsafe fn foo() {}
+
+#[pre_init] //~ ERROR symbol `__pre_init` is already defined
+unsafe fn bar() {}
+
+#[entry]
+fn baz() -> ! {
+    loop {}
+}