rust/tests/run-coverage/dead_code.coverage

   LL|       |#![allow(dead_code, unused_assignments, unused_variables)]
   LL|       |
   LL|      0|pub fn unused_pub_fn_not_in_library() {
   LL|      0|    // Initialize test constants in a way that cannot be determined at compile time, to ensure
   LL|      0|    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
   LL|      0|    // dependent conditions.
   LL|      0|    let is_true = std::env::args().len() == 1;
   LL|      0|
   LL|      0|    let mut countdown = 0;
   LL|      0|    if is_true {
   LL|      0|        countdown = 10;
   LL|      0|    }
   LL|      0|}
   LL|       |
   LL|      0|fn unused_fn() {
   LL|      0|    // Initialize test constants in a way that cannot be determined at compile time, to ensure
   LL|      0|    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
   LL|      0|    // dependent conditions.
   LL|      0|    let is_true = std::env::args().len() == 1;
   LL|      0|
   LL|      0|    let mut countdown = 0;
   LL|      0|    if is_true {
   LL|      0|        countdown = 10;
   LL|      0|    }
   LL|      0|}
   LL|       |
   LL|      1|fn main() {
   LL|      1|    // Initialize test constants in a way that cannot be determined at compile time, to ensure
   LL|      1|    // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
   LL|      1|    // dependent conditions.
   LL|      1|    let is_true = std::env::args().len() == 1;
   LL|      1|
   LL|      1|    let mut countdown = 0;
   LL|      1|    if is_true {
   LL|      1|        countdown = 10;
   LL|      1|    }
                   ^0
   LL|      1|}