1 warning: `#[derive]` does nothing on macro invocations
2 --> $DIR/issue-49934.rs:30:5
7 = note: this may become a hard error in a future release
9 warning: unused attribute
10 --> $DIR/issue-49934.rs:16:8
12 LL | fn foo<#[derive(Debug)] T>() { //~ WARN unused attribute
15 note: lint level defined here
16 --> $DIR/issue-49934.rs:14:9
18 LL | #![warn(unused_attributes)] //~ NOTE lint level defined here
21 warning: unused attribute
22 --> $DIR/issue-49934.rs:18:9
24 LL | #[derive(Debug)] //~ WARN unused attribute
27 warning: unused attribute
28 --> $DIR/issue-49934.rs:36:5
30 LL | #[derive(Debug)] //~ WARN unused attribute
33 warning: unused attribute
34 --> $DIR/issue-49934.rs:40:5
36 LL | #[derive(Debug)] //~ WARN unused attribute
39 warning: unused attribute
40 --> $DIR/issue-49934.rs:44:13
42 LL | let _ = #[derive(Debug)] "Hello, world!";
45 warning: unused attribute
46 --> $DIR/issue-49934.rs:49:9
48 LL | #[derive(Debug)] //~ WARN unused attribute