tests/coverage/closure_bug.coverage

   LL|       |// Regression test for #115930.
   LL|       |// All of these closures are identical, and should produce identical output in
   LL|       |// the coverage report. However, an unstable sort was causing them to be treated
   LL|       |// inconsistently when preparing coverage spans.
   LL|       |
   LL|       |#[rustfmt::skip]
   LL|      1|fn main() {
   LL|      1|    let truthy = std::env::args().len() == 1;
   LL|      1|
   LL|      1|    let a
   LL|       |        =
   LL|       |        |
   LL|       |        |
   LL|      2|        if truthy { true } else { false };
                                                ^0
   LL|       |
   LL|      1|    a();
   LL|      1|    if truthy { a(); }
                                    ^0
   LL|       |
   LL|      1|    let b
   LL|       |        =
   LL|       |        |
   LL|       |        |
   LL|      2|        if truthy { true } else { false };
                                                ^0
   LL|       |
   LL|      1|    b();
   LL|      1|    if truthy { b(); }
                                    ^0
   LL|       |
   LL|      1|    let c
   LL|       |        =
   LL|       |        |
   LL|       |        |
   LL|      2|        if truthy { true } else { false };
                                                ^0
   LL|       |
   LL|      1|    c();
   LL|      1|    if truthy { c(); }
                                    ^0
   LL|       |
   LL|      1|    let d
   LL|       |        =
   LL|       |        |
   LL|       |        |
   LL|      2|        if truthy { true } else { false };
                                                ^0
   LL|       |
   LL|      1|    d();
   LL|      1|    if truthy { d(); }
                                    ^0
   LL|      1|}