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+A literal value was used inside `#[derive]`.
+
+Erroneous code example:
+
+```compile_fail,E0777
+#[derive("Clone")] // error!
+struct Foo;
+```
+
+Only paths to traits are allowed as argument inside `#[derive]`. You can find
+more information about the `#[derive]` attribute in the [Rust Book].
+
+
+```
+#[derive(Clone)] // ok!
+struct Foo;
+```
+
+[Rust Book]: https://doc.rust-lang.org/book/appendix-03-derivable-traits.html