Realm is logged in
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
  * frame #0: 0x0000000102c52164 Check Writer`realm::sync::Session::on_new_flx_sync_subscription(this=0x0000000000000000, new_version=11) at client.cpp:1584:5
    frame #1: 0x0000000102a77ac8 Check Writer`realm::SyncSession::make_flx_subscription_store(this=0x0000600003532038, new_version=11)::$_2::operator()(long long) const at sync_session.cpp:259:20
    frame #2: 0x0000000102a77a38 Check Writer`void realm::util::UniqueFunction<void (long long)>::call_regular_void<realm::SyncSession::make_flx_subscription_store(is_void=std::__1::true_type @ 0x000000016dc4114f, f=0x0000600003532038, args=0x000000016dc411c0)::$_2>(std::__1::integral_constant<bool, true>, realm::SyncSession::make_flx_subscription_store()::$_2&, long long&&) at functional.hpp:148:9
    frame #3: 0x0000000102a77998 Check Writer`realm::util::UniqueFunction<void (long long)>::SpecificImpl<realm::SyncSession::make_flx_subscription_store(this=0x0000600003532030, args=0x000000016dc411c0)::$_2>::call(long long&&) at functional.hpp:168:20
    frame #4: 0x0000000102d22b9c Check Writer`realm::util::UniqueFunction<void (long long)>::operator(this=0x00006000008313e8, args=11)(long long) const at functional.hpp:94:22
    frame #5: 0x0000000102d22a3c Check Writer`realm::sync::MutableSubscriptionSet::commit(this=0x0000600000235140) && at subscriptions.cpp:475:9
    frame #6: 0x00000001024d60c4 Check Writer`-[RLMSyncSubscriptionSet write:onComplete:](self=0x0000600001c1f640, _cmd="write:onComplete:", block=0x0000000102623a60, completionBlock=0x00000001024ff748) at RLMSyncSubscription.mm:243:111
    frame #7: 0x00000001026239ac Check Writer`SyncSubscriptionSet.write(block=0x0000000102223d60 Check Writer`partial apply forwarder for closure #1 () -> () in Check_Writer.AccountList.setSubscription() -> () at <compiler-generated>, onComplete=nil, self=RealmSwift.SyncSubscriptionSet @ 0x000000016dc418b8) at SyncSubscription.swift:203:32
    frame #8: 0x000000010221edb4 Check Writer`AccountList.setSubscription(self=Check_Writer.AccountList @ 0x0000000123e0ea80) at AccountList.swift:63:23
    frame #9: 0x000000010221ece4 Check Writer`implicit closure #2 in implicit closure #1 in AccountList.body.getter(self=Check_Writer.AccountList @ 0x0000000123e0ea80) at AccountList.swift:58:28
    frame #10: 0x00000001b9b2d924 SwiftUI`closure #1 () -> () in SwiftUI._AppearanceActionModifier.MergedBox.update() -> () + 92
    frame #11: 0x00000001b9c9518c SwiftUI`reabstraction thunk helper from @escaping @callee_guaranteed () -> () to @escaping @callee_guaranteed () -> (@out ()) + 20
    frame #12: 0x00000001ba1a0124 SwiftUI`closure #1 () -> () in SwiftUI.ViewRendererHost.render(interval: Swift.Double, updateDisplayList: Swift.Bool) -> () + 2256
    frame #13: 0x00000001ba198c7c SwiftUI`SwiftUI.ViewRendererHost.render(interval: Swift.Double, updateDisplayList: Swift.Bool) -> () + 348
    frame #14: 0x00000001ba3d75f4 SwiftUI`SwiftUI._UIHostingView.layoutSubviews() -> () + 248
    frame #15: 0x00000001ba3d765c SwiftUI`@objc SwiftUI._UIHostingView.layoutSubviews() -> () + 24
    frame #16: 0x00000001852ea564 UIKitCore`-[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2588
    frame #17: 0x0000000188513848 QuartzCore`CA::Layer::layout_if_needed(CA::Transaction*) + 472
    frame #18: 0x000000018851e654 QuartzCore`CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 116
    frame #19: 0x0000000188457538 QuartzCore`CA::Context::commit_transaction(CA::Transaction*, double, double*) + 448
    frame #20: 0x0000000188483564 QuartzCore`CA::Transaction::commit() + 696
    frame #21: 0x0000000184d991e8 UIKitCore`__34-[UIApplication _firstCommitBlock]_block_invoke_2 + 40
    frame #22: 0x0000000180360580 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 20
    frame #23: 0x000000018035f854 CoreFoundation`__CFRunLoopDoBlocks + 408
    frame #24: 0x000000018035a018 CoreFoundation`__CFRunLoopRun + 764
    frame #25: 0x0000000180359804 CoreFoundation`CFRunLoopRunSpecific + 572
    frame #26: 0x000000018c23660c GraphicsServices`GSEventRunModal + 160
    frame #27: 0x0000000184d7bd2c UIKitCore`-[UIApplication _run] + 992
    frame #28: 0x0000000184d808c8 UIKitCore`UIApplicationMain + 112
    frame #29: 0x00000001ba1f7564 SwiftUI`closure #1 (Swift.UnsafeMutablePointer<Swift.Optional<Swift.UnsafeMutablePointer<Swift.Int8>>>) -> Swift.Never in SwiftUI.KitRendererCommon(Swift.AnyObject.Type) -> Swift.Never + 160
    frame #30: 0x00000001ba1f74c0 SwiftUI`SwiftUI.runApp<τ_0_0 where τ_0_0: SwiftUI.App>(τ_0_0) -> Swift.Never + 164
    frame #31: 0x00000001b9c2aadc SwiftUI`static SwiftUI.App.main() -> () + 80
    frame #32: 0x00000001021fac8c Check Writer`static CheckWriterApp.$main(self=Check_Writer.CheckWriterApp) at CheckWriterApp.swift:13:1
    frame #33: 0x00000001021fae54 Check Writer`main at CheckWriterApp.swift:0
    frame #34: 0x0000000105d71cd8 dyld_sim`start_sim + 20
    frame #35: 0x0000000105bb90f4 dyld`start + 520
(lldb)

.onAppear(perform: setSubscription)

private func setSubscription() {
  let subscriptions = realm.subscriptions
  subscriptions.write {
      if let currentSubscription = subscriptions.first(named: "bankAccountList") {
          print("Replacing subscription for bankAccountList")
          currentSubscription.update(toType: BankAccount.self) { bankAccount in
              bankAccount._id != nil
          }
      } else {
          print("Appending subscription for bankAccountList")
          subscriptions.append(QuerySubscription<BankAccount>(name: "bankAccountList") { bankAccount in
              bankAccount._id != nil
          })
      }
    }
  }