Fixes test_runtime_feature_enable_with_program_cache().

runtime/src/bank/tests.rs

@@ -12504,8 +12504,14 @@ fn test_runtime_feature_enable_with_program_cache() {
     genesis_config
         .accounts
         .remove(&feature_set::reject_callx_r10::id());
-    let mut bank_forks = BankForks::new(Bank::new_for_tests(&genesis_config));
+    let bank_forks = BankForks::new(Bank::new_for_tests(&genesis_config));
     let root_bank = bank_forks.root_bank();
+    let bank_forks = Arc::new(RwLock::new(bank_forks));
+    root_bank
+        .loaded_programs_cache
+        .write()
+        .unwrap()
+        .set_fork_graph(bank_forks.clone());
 
     // Test a basic transfer
     let amount = genesis_config.rent.minimum_balance(0);
@@ -12564,9 +12570,19 @@ fn test_runtime_feature_enable_with_program_cache() {
 
     // Reroot to call LoadedPrograms::prune() and end the current recompilation phase
     goto_end_of_slot(bank.clone());
-    bank_forks.insert(Arc::into_inner(bank).unwrap());
-    let bank = bank_forks.working_bank();
-    bank_forks.set_root(bank.slot, &AbsRequestSender::default(), None);
+    bank_forks
+        .write()
+        .unwrap()
+        .insert(Arc::into_inner(bank).unwrap());
+    let bank = bank_forks.read().unwrap().working_bank();
+    bank.loaded_programs_cache
+        .write()
+        .unwrap()
+        .prune(bank.slot, bank.epoch());
+    bank_forks
+        .write()
+        .unwrap()
+        .set_root(bank.slot, &AbsRequestSender::default(), None);
 
     // Advance to next epoch, which starts the next recompilation phase
     let bank = new_from_parent_next_epoch(bank, 1);