Turn internal lints into tool lints

1 files changed, 6 insertions, 2 deletions

diff --git a/src/bootstrap/bin/rustc.rs b/src/bootstrap/bin/rustc.rs
index 5b5e9e0def2..a1333ff3dc7 100644
--- a/src/bootstrap/bin/rustc.rs
+++ b/src/bootstrap/bin/rustc.rs
@@ -306,10 +306,14 @@ fn main() {
     }
 
     // This is required for internal lints.
+    cmd.arg("-Zunstable-options");
     if let Some(crate_name) = args.windows(2).find(|a| &*a[0] == "--crate-name") {
         let crate_name = crate_name[1].to_string_lossy();
-        if crate_name.starts_with("rustc") || crate_name.starts_with("syntax") {
-            cmd.arg("-Zunstable-options");
+        if crate_name.starts_with("rustc")
+            || crate_name.starts_with("syntax")
+            || crate_name == "arena"
+            || crate_name == "fmt_macros"
+        {
             if stage != "0" {
                 cmd.arg("-Wrustc::internal");
             }