gccrs: Add regression test for generic auto traits

Generics are forbidden on auto traits and an error should be emitted.
This commit highlight this behavior.

gcc/testsuite/ChangeLog:

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

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

diff --git a/gcc/testsuite/rust/compile/generic_auto_trait.rs b/gcc/testsuite/rust/compile/generic_auto_trait.rs
new file mode 100644 (file)
index 0000000..ae6a51d
--- /dev/null
+++ b/gcc/testsuite/rust/compile/generic_auto_trait.rs
@@ -0,0 +1,2 @@
+auto trait IsCooler<G> {}
+// { dg-error "auto traits cannot have generic parameters .E0567." "" { target *-*-* } .-1 }