error: attribute value must be a literal
  --> $DIR/darwin-objc-bad-arg.rs:12:18
   |
LL |     objc::class!(s);
   |                  ^

error: attribute value must be a literal
  --> $DIR/darwin-objc-bad-arg.rs:15:18
   |
LL |     objc::class!(NSObject);
   |                  ^^^^^^^^

error: `objc::class!` expected a string literal
  --> $DIR/darwin-objc-bad-arg.rs:18:18
   |
LL |     objc::class!(123);
   |                  ^^^

error: `objc::class!` may not contain null characters
  --> $DIR/darwin-objc-bad-arg.rs:21:18
   |
LL |     objc::class!("NSObject\0");
   |                  ^^^^^^^^^^^^

error: attribute value must be a literal
  --> $DIR/darwin-objc-bad-arg.rs:25:21
   |
LL |     objc::selector!(s);
   |                     ^

error: attribute value must be a literal
  --> $DIR/darwin-objc-bad-arg.rs:28:21
   |
LL |     objc::selector!(alloc);
   |                     ^^^^^

error: `objc::selector!` expected a string literal
  --> $DIR/darwin-objc-bad-arg.rs:31:21
   |
LL |     objc::selector!(123);
   |                     ^^^

error: `objc::selector!` may not contain null characters
  --> $DIR/darwin-objc-bad-arg.rs:34:21
   |
LL |     objc::selector!("alloc\0");
   |                     ^^^^^^^^^

error: aborting due to 8 previous errors