Add derive(Debug) on BankWithScheduler

Author: ryoqun

runtime/src/installed_scheduler_pool.rs

@@ -32,6 +32,7 @@ pub type DefaultInstalledSchedulerBox = ();
 /// avoid ambiguity as to which to clone: BankWithScheduler or Arc<Bank>. Use
 /// clone_without_scheduler() for Arc<Bank>. Otherwise, use clone_with_scheduler() (this should be
 /// unusual outside scheduler code-path)
+#[derive(Debug)]
 pub struct BankWithScheduler {
     inner: Arc<BankWithSchedulerInner>,
 }