This test checks that we don't crash while completing receivers that may happen
to be builtin types (due to invalid code). This crash was reported by telemetry
in golang/go#71044.

-- flags --
-ignore_extra_diags

-- go.mod --
module example.com/amap

go 1.18

-- a.go --
package amap

import "unsafe"

func (unsafe.Pointer) _() {} //@ rank(re"()unsafe")
