error: functions with the "riscv-interrupt-m" ABI cannot be `async`
  --> $DIR/cannot-be-coroutine.rs:44:1
   |
LL | async extern "riscv-interrupt-m" fn riscv_m() {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: remove the `async` keyword from this definition
   |
LL - async extern "riscv-interrupt-m" fn riscv_m() {
LL + extern "riscv-interrupt-m" fn riscv_m() {
   |

error: functions with the "riscv-interrupt-s" ABI cannot be `async`
  --> $DIR/cannot-be-coroutine.rs:48:1
   |
LL | async extern "riscv-interrupt-s" fn riscv_s() {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: remove the `async` keyword from this definition
   |
LL - async extern "riscv-interrupt-s" fn riscv_s() {
LL + extern "riscv-interrupt-s" fn riscv_s() {
   |

error: requires `ResumeTy` lang_item
  --> $DIR/cannot-be-coroutine.rs:32:19
   |
LL |   async fn vanilla(){
   |  ___________________^
LL | |
LL | | }
   | |_^

error: aborting due to 3 previous errors