test/wasm2js/unreachable-get-cycle.wast

(module
 (type $0 (func (param i64 f64) (result i64)))
 (memory $0 1 1)
 (func $0 (; 0 ;) (type $0) (param $0 i64) (param $1 f64) (result i64)
  (local $2 f32)
  (if (result i64)
   (loop $label$1 (result i32)
    (br_if $label$1
     (i32.const 1)
    )
    (i32.const 0)
   )
   (then
    (loop $label$3
     (block $label$4
      (f32.store offset=22 align=2
       (i32.const 0)
       (local.get $2)
      )
      (drop
       (local.tee $2
        (if (result f32)
         (i32.const -19666)
         (then
          (local.get $2)
         )
         (else
          (unreachable)
         )
        )
       )
      )
     )
     (br $label$3)
    )
   )
   (else
    (i64.const 1)
   )
  )
 )
)