issue-93054.coverage

   LL|       |#![allow(dead_code, unreachable_code)]
   LL|       |//@ edition: 2021
   LL|       |
   LL|       |// Regression test for #93054: Functions using uninhabited types often only have a single,
   LL|       |// unreachable basic block which doesn't get instrumented. This should not cause llvm-cov to fail.
   LL|       |// Since these kinds functions can't be invoked anyway, it's ok to not have coverage data for them.
   LL|       |
   LL|       |enum Never {}
   LL|       |
   LL|       |impl Never {
   LL|       |    fn foo(self) {
   LL|       |        match self {}
   LL|       |        make().map(|never| match never {});
   LL|       |    }
   LL|       |
   LL|       |    fn bar(&self) {
   LL|       |        match *self {}
   LL|       |    }
   LL|       |}
   LL|       |
   LL|      0|async fn foo2(never: Never) {
   LL|       |    match never {}
   LL|       |}
   LL|       |
   LL|      0|fn make() -> Option<Never> {
   LL|      0|    None
   LL|      0|}
   LL|       |
   LL|      1|fn main() {}