1 error: cannot find attribute `C` in this scope
2 --> $DIR/proc-macro-attributes.rs:7:3
5 | ^ help: a derive helper attribute with a similar name exists: `B`
7 error[E0659]: `B` is ambiguous (derive helper attribute vs any other name)
8 --> $DIR/proc-macro-attributes.rs:6:3
13 note: `B` could refer to the derive helper attribute defined here
14 --> $DIR/proc-macro-attributes.rs:11:10
18 note: `B` could also refer to the derive macro imported here
19 --> $DIR/proc-macro-attributes.rs:3:1
24 error[E0659]: `B` is ambiguous (derive helper attribute vs any other name)
25 --> $DIR/proc-macro-attributes.rs:8:3
30 note: `B` could refer to the derive helper attribute defined here
31 --> $DIR/proc-macro-attributes.rs:11:10
35 note: `B` could also refer to the derive macro imported here
36 --> $DIR/proc-macro-attributes.rs:3:1
41 error[E0659]: `B` is ambiguous (derive helper attribute vs any other name)
42 --> $DIR/proc-macro-attributes.rs:9:3
47 note: `B` could refer to the derive helper attribute defined here
48 --> $DIR/proc-macro-attributes.rs:11:10
52 note: `B` could also refer to the derive macro imported here
53 --> $DIR/proc-macro-attributes.rs:3:1
58 error[E0659]: `B` is ambiguous (derive helper attribute vs any other name)
59 --> $DIR/proc-macro-attributes.rs:10:3
61 LL | #[B(arbitrary tokens)]
64 note: `B` could refer to the derive helper attribute defined here
65 --> $DIR/proc-macro-attributes.rs:11:10
69 note: `B` could also refer to the derive macro imported here
70 --> $DIR/proc-macro-attributes.rs:3:1
75 error: aborting due to 5 previous errors
77 For more information about this error, try `rustc --explain E0659`.