error: unused attribute
  --> $DIR/lint-obsolete-attr.rs:8:1
   |
LL | #[ab_isize="stdcall"] extern {} //~ ERROR unused attribute
   | ^^^^^^^^^^^^^^^^^^^^^
   |
note: lint level defined here
  --> $DIR/lint-obsolete-attr.rs:4:9
   |
LL | #![deny(unused_attributes)]
   |         ^^^^^^^^^^^^^^^^^

error: unused attribute
  --> $DIR/lint-obsolete-attr.rs:10:1
   |
LL | #[fixed_stack_segment] fn f() {} //~ ERROR unused attribute
   | ^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors