Auto merge of #138197 - Zalathar:assemble-cycle, r=<try>

(DO NOT MERGE) Investigating bootstrap cycle

r? ghost

try-job: aarch64-apple

Author: bors

src/bootstrap/src/core/build_steps/compile.rs

@@ -992,6 +992,7 @@ impl Step for Rustc {
     }
 
     fn make_run(run: RunConfig<'_>) {
+        // dummy change
         let crates = run.cargo_crates_in_set();
         run.builder.ensure(Rustc {
             compiler: run

src/bootstrap/src/core/config/config.rs

@@ -48,6 +48,7 @@ pub(crate) const RUSTC_IF_UNCHANGED_ALLOWED_PATHS: &[&str] = &[
     ":!src/rustdoc-json-types",
     ":!tests",
     ":!triagebot.toml",
+    ":!src/bootstrap", // lol, lmao
 ];
 
 macro_rules! check_ci_llvm {

tests/ui/instrument-coverage/bad-value.rs

@@ -1,5 +1,5 @@
 //@ revisions: blank bad
-//@ [blank] compile-flags: -Cinstrument-coverage=
+//@ [blank] compile-flags: -Cinstrument-coverage=_
 //@ [bad] compile-flags: -Cinstrument-coverage=bad-value
 
 fn main() {}