Gracefully exit when --keep-stage used on clean source tree

rust-lang · Jan 28, 2023 · 65186e0 · 65186e0
1 parent d6f0642
commit 65186e0
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
@@ -1431,6 +1431,13 @@ impl Build {
             return Vec::new();
         }
 
+        if !stamp.exists() {
+            eprintln!(
+                "Warning: Unable to find the stamp file, did you try to keep a nonexistent build stage?"
+            );
+            crate::detail_exit(1);
+        }
+
         let mut paths = Vec::new();
         let contents = t!(fs::read(stamp), &stamp);
         // This is the method we use for extracting paths from the stamp file passed to us. See