Move /src/test to /tests

tests/incremental/cyclic-trait-hierarchy.rs

@@ -0,0 +1,13 @@
+// Adapted from rust-lang/rust#58813
+
+// revisions: rpass1 cfail2
+
+#[cfg(rpass1)]
+pub trait T2 {}
+#[cfg(cfail2)]
+pub trait T2: T1 {}
+//[cfail2]~^ ERROR cycle detected when computing the super predicates of `T2`
+
+pub trait T1: T2 {}
+
+fn main() {}