Rollup merge of rust-lang#95445 - jyn514:rustc-unit-tests, r=Dylan-DPC

Dylan-DPC · web-flow · commit 14d8bfdbfdd7 · 2022-03-31T13:09:52.000+02:00
Don't build the full compiler before running unit tests This has been present since `builder.ensure` was first added in rust-lang#43059. It's unclear to me why it was added then - I tested these changes locally with `x test compiler/rustc_data_structures --stage 0` and they worked fine. Fixes rust-lang#51748.
diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
@@ -1998,7 +1998,6 @@ impl Step for Crate {
                 compile::std_cargo(builder, target, compiler.stage, &mut cargo);
             }
             Mode::Rustc => {
-                builder.ensure(compile::Rustc { compiler, target });
                 compile::rustc_cargo(builder, &mut cargo, target);
             }
             _ => panic!("can only test libraries"),

Original file line number	Diff line number	Diff line change
`@@ -1998,7 +1998,6 @@ impl Step for Crate {`
`1998`	`1998`	`compile::std_cargo(builder, target, compiler.stage, &mut cargo);`
`1999`	`1999`	`}`
`2000`	`2000`	`Mode::Rustc => {`
`2001`		`- builder.ensure(compile::Rustc { compiler, target });`
`2002`	`2001`	`compile::rustc_cargo(builder, &mut cargo, target);`
`2003`	`2002`	`}`
`2004`	`2003`	`_ => panic!("can only test libraries"),`