fix issue with x.py setup running into explicit panic

Author: Joshument

src/bootstrap/lib.rs

@@ -654,8 +654,6 @@ impl Build {
             job::setup(self);
         }
 
-        // Download rustfmt early so that it can be used in rust-analyzer configs.
-        let _ = &builder::Builder::new(&self).initial_rustfmt();
         self.maybe_update_submodules();
 
         if let Subcommand::Format { check, paths } = &self.config.cmd {
@@ -670,6 +668,9 @@ impl Build {
             return setup::setup(&self.config, *profile);
         }
 
+        // Download rustfmt early so that it can be used in rust-analyzer configs.
+        let _ = &builder::Builder::new(&self).initial_rustfmt();
+
         {
             let builder = builder::Builder::new(&self);
             if let Some(path) = builder.paths.get(0) {