Add test for known-bugs of cfg_accessible

src/test/ui/conditional-compilation/cfg_accessible-bugs.rs

@@ -0,0 +1,30 @@
+// This test is a collection of test that should pass.
+//
+// check-fail
+
+#![feature(cfg_accessible)]
+#![feature(trait_alias)]
+
+enum Enum {
+    Existing { existing: u8 },
+}
+
+trait TraitAlias = std::fmt::Debug + Send;
+
+// FIXME: Currently returns `false` but should be "not sure"
+#[cfg_accessible(Enum::Existing::existing)]
+const A: bool = true;
+
+// FIXME: Currently returns `false` but should be "not sure"
+#[cfg_accessible(Enum::Existing::unresolved)]
+const B: bool = true;
+
+// FIXME: Currently shows "cannot determine" but should be `false`
+#[cfg_accessible(unresolved)] //~ ERROR cannot determine
+const C: bool = true;
+
+// FIXME: Currently shows "not sure" but should be `false`
+#[cfg_accessible(TraitAlias::unresolved)] //~ ERROR not sure whether the path is accessible or not
+const D: bool = true;
+
+fn main() {}

src/test/ui/conditional-compilation/cfg_accessible-bugs.stderr

@@ -0,0 +1,16 @@
+error: not sure whether the path is accessible or not
+  --> $DIR/cfg_accessible-bugs.rs:28:18
+   |
+LL | #[cfg_accessible(TraitAlias::unresolved)]
+   |                  ^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: the type may have associated items, but we are currently not checking them
+
+error: cannot determine whether the path is accessible or not
+  --> $DIR/cfg_accessible-bugs.rs:24:1
+   |
+LL | #[cfg_accessible(unresolved)]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 2 previous errors
+

src/test/ui/conditional-compilation/cfg_accessible-not_sure.rs

@@ -33,12 +33,6 @@ enum Enum {
     Existing { existing: u8 },
 }
 
-// FIXME: Currently returns `false` but should be "not sure"
-#[cfg_accessible(Enum::Existing::existing)]
-const A: bool = true;
-// FIXME: Currently returns `false` but should be "not sure"
-#[cfg_accessible(Enum::Existing::unresolved)]
-const B: bool = true;
 #[cfg_accessible(Enum::unresolved)] //~ ERROR not sure
 const C: bool = true;