From dd07459096beddf523b86a7ef03e4703390a7319 Mon Sep 17 00:00:00 2001
From: Daria Sukhonina <dariasukhonina@gmail.com>
Date: Tue, 26 Aug 2025 19:18:39 +0300
Subject: [PATCH] Comment on intentional field order

---
 compiler/rustc_codegen_ssa/src/back/write.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/compiler/rustc_codegen_ssa/src/back/write.rs b/compiler/rustc_codegen_ssa/src/back/write.rs
index 0d766d2704ba..8586615f7c76 100644
--- a/compiler/rustc_codegen_ssa/src/back/write.rs
+++ b/compiler/rustc_codegen_ssa/src/back/write.rs
@@ -1958,6 +1958,9 @@ pub struct OngoingCodegen<B: ExtraBackendMethods> {
     pub backend: B,
     pub crate_info: CrateInfo,
     pub output_filenames: Arc<OutputFilenames>,
+    // Field order below is intended to terminate the coordinator thread before two fields below
+    // drop and prematurely close channels used by coordinator thread. See `Coordinator`'s
+    // `Drop` implementation for more info.
     pub coordinator: Coordinator<B>,
     pub codegen_worker_receive: Receiver<CguMessage>,
     pub shared_emitter_main: SharedEmitterMain,