Add a regression test for unsafe module validation

Add a new test to check for unsafe modules during AST validation pass.

gcc/testsuite/ChangeLog:

	* rust/compile/unsafe_module.rs: New test.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

diff --git a/gcc/testsuite/rust/compile/unsafe_module.rs b/gcc/testsuite/rust/compile/unsafe_module.rs
new file mode 100644 (file)
index 0000000..74bc170
--- /dev/null
+++ b/gcc/testsuite/rust/compile/unsafe_module.rs
@@ -0,0 +1,2 @@
+unsafe mod toto {}
+// { dg-error "module cannot be declared unsafe" "" { target *-*-* } .-1 }