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+Something other than a module was found in visibility scope.
+
+Erroneous code example:
+
+```compile_fail,E0577,edition2018
+pub struct Sea;
+
+pub (in crate::Sea) struct Shark; // error!
+
+fn main() {}
+```
+
+`Sea` is not a module, therefore it is invalid to use it in a visibility path.
+To fix this error we need to ensure `sea` is a module.
+
+Please note that the visibility scope can only be applied on ancestors!
+
+```edition2018
+pub mod sea {
+    pub (in crate::sea) struct Shark; // ok!
+}
+
+fn main() {}
+```