refactor(compile): Relax traits for UnitOutput

Author: epage

src/cargo/core/compiler/compilation.rs

@@ -53,7 +53,6 @@ pub struct Doctest {
 }
 
 /// Information about the output of a unit.
-#[derive(Ord, PartialOrd, Eq, PartialEq)]
 pub struct UnitOutput {
     /// The unit that generated this output.
     pub unit: Unit,

src/cargo/ops/cargo_test.rs

@@ -103,7 +103,7 @@ pub fn run_benches(ws: &Workspace<'_>, options: &TestOptions, args: &[&str]) ->
 
 fn compile_tests<'a>(ws: &Workspace<'a>, options: &TestOptions) -> CargoResult<Compilation<'a>> {
     let mut compilation = ops::compile(ws, &options.compile_opts)?;
-    compilation.tests.sort();
+    compilation.tests.sort_by_key(|u| u.unit.clone());
     Ok(compilation)
 }