From c5d661a01cd085c26417b90b57c86e01ea1009f3 Mon Sep 17 00:00:00 2001
From: Joseph Bingham <jo3bingham@gmail.com>
Date: Mon, 1 Aug 2022 20:15:33 +0100
Subject: [PATCH] add comment

---
 src/bootstrap/check.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/bootstrap/check.rs b/src/bootstrap/check.rs
index ec17a7b4dfe..aa033d87c42 100644
--- a/src/bootstrap/check.rs
+++ b/src/bootstrap/check.rs
@@ -140,6 +140,9 @@ fn run(self, builder: &Builder<'_>) {
             cargo_subcommand(builder.kind),
         );
 
+        // If we're not in stage 0, tests and examples will fail to compile
+        // from `core` definitions being loaded from two different `libcore`
+        // .rmeta and .rlib files.
         if compiler.stage == 0 {
             cargo.arg("--all-targets");
         }