From 0bb4e25ec432beb3629280ea65d1d5475b4f3ee1 Mon Sep 17 00:00:00 2001
From: Joshua Nelson <jnelson@cloudflare.com>
Date: Sun, 11 Sep 2022 15:14:03 -0500
Subject: [PATCH] Give a better error messages when the rustc shim is missing

---
 src/bootstrap/lib.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 4795ae2f9563..dc53e4b545b3 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -463,7 +463,10 @@ impl Build {
             .to_path_buf();
         if !bootstrap_out.join(exe("rustc", config.build)).exists() && !cfg!(test) {
             // this restriction can be lifted whenever https://github.com/rust-lang/rfcs/pull/3028 is implemented
-            panic!("run `cargo build --bins` before `cargo run`")
+            panic!(
+                "`rustc` not found in {}, run `cargo build --bins` before `cargo run`",
+                bootstrap_out.display()
+            )
         }
 
         let mut build = Build {