$ RUST_BACKTRACE=full cargo run --example ui Finished dev [unoptimized + debuginfo] target(s) in 0.14s Running `/Users/nathan/bv/bevy/target/debug/examples/ui` thread 'Compute Task Pool (21)' panicked at 'called `Option::unwrap()` on a `None` value', crates/bevy_text/src/font_atlas_set.rs:53:20 stack backtrace: 0: 0x1036312ee - ::fmt::h26e8f1b884bae128 1: 0x10365931c - core::fmt::write::ha0b53fc066268c71 2: 0x10362d2f7 - std::io::Write::write_fmt::h410b83a4c70c6549 3: 0x103633865 - std::panicking::default_hook::{{closure}}::h70c11ad9e0ccd806 4: 0x1036335a2 - std::panicking::default_hook::hd9eda5765f18f021 5: 0x103633e1d - std::panicking::rust_panic_with_hook::h3fc8a110bc9d166f 6: 0x1036339f2 - rust_begin_unwind 7: 0x1036802bf - core::panicking::panic_fmt::h04439fd445b5f690 8: 0x103680217 - core::panicking::panic::h2f2a3cb96f8c3d83 9: 0x102e212f5 - core::option::Option::unwrap::hffdf9346142b833d 10: 0x102e028d0 - bevy_text::font_atlas_set::FontAtlasSet::add_glyphs_to_atlas::h2ed9f009bb9bd47d 11: 0x102d49066 - bevy_ui::widget::text::text_system::hd35ddfc6b52f60e2 12: 0x102d92de5 - core::ops::function::Fn::call::h0bfa083cc3b2b5ea 13: 0x102d4c54f - core::ops::function::impls:: for &F>::call_mut::h318bcaa2d5825811 14: 0x102d58889 - >::system::{{closure}}::hccccac97f80d9996 15: 0x102d5a2df - as bevy_ecs::system::system::System>::run::h6b7f6c7d7eaa82d1 16: 0x10352ef5d - bevy_ecs::schedule::parallel_executor::ExecutorStage::run_ready_systems::{{closure}}::h21a0d865680b33b6 17: 0x103547520 - as core::future::future::Future>::poll::h382358505f198c07 18: 0x10355413e - as core::future::future::Future>::poll::h4179957822632b3f 19: 0x10353896c - async_task::raw::RawTask::run::hb716761523875015 20: 0x103573a83 - async_task::task::Task::run::hf82f8cb288f486df 21: 0x10356d9e1 - multitask::Ticker::tick::h6d97d8854e80a449 22: 0x10355f3a8 - bevy_tasks::task_pool::TaskPool::new_internal::{{closure}}::{{closure}}::h308cea1e75052d4d 23: 0x10355d0e0 - std::sys_common::backtrace::__rust_begin_short_backtrace::h8b6cd4880f6bb703 24: 0x103560740 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h97fdebce54bb0eae 25: 0x103568ae0 - as core::ops::function::FnOnce<()>>::call_once::h3c41bb15ddc6d2f8 26: 0x10355fd31 - std::panicking::try::do_call::h5090cfb14c9f3e26 27: 0x10355fddd - __rust_try 28: 0x10355fc57 - std::panicking::try::haeb52809323f0c0d 29: 0x103568b20 - std::panic::catch_unwind::hbb875c57657047c0 30: 0x10356058b - std::thread::Builder::spawn_unchecked::{{closure}}::h3d4b82ab4abbab9a 31: 0x103562fc1 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hc968fe1ea53fd55d 32: 0x10363a44d - std::sys::unix::thread::Thread::new::thread_start::h2fb48f1d6015d321 33: 0x7fff6ef8e109 - _pthread_start thread 'Compute Task Pool (14)' panicked at 'task has failed', /Users/nathan/.cargo/registry/src/github.com-1ecc6299db9ec823/multitask-0.2.0/src/lib.rs:166:48 stack backtrace: 0: 0x1036312ee - ::fmt::h26e8f1b884bae128 1: 0x10365931c - core::fmt::write::ha0b53fc066268c71 2: 0x10362d2f7 - std::io::Write::write_fmt::h410b83a4c70c6549 3: 0x103633865 - std::panicking::default_hook::{{closure}}::h70c11ad9e0ccd806 4: 0x1036335a2 - std::panicking::default_hook::hd9eda5765f18f021 5: 0x103633e1d - std::panicking::rust_panic_with_hook::h3fc8a110bc9d166f 6: 0x1036339f2 - rust_begin_unwind 7: 0x1036802bf - core::panicking::panic_fmt::h04439fd445b5f690 8: 0x10368014a - core::option::expect_failed::h2cafbfb636f224cf 9: 0x103530591 - core::option::Option::expect::h37465ae4b110cac3 10: 0x103540f76 - as core::future::future::Future>::poll::h32d1aa5b76e84c1a 11: 0x103544b83 - bevy_tasks::task_pool::TaskPool::scope::{{closure}}::hc773786dbd604563 12: 0x10354734a - as core::future::future::Future>::poll::h0fe322b57f556177 13: 0x10355421d - as core::future::future::Future>::poll::hb9c211fcd074239c 14: 0x1035378b0 - async_task::raw::RawTask::run::h87654eaa406eebd3 15: 0x103573a83 - async_task::task::Task::run::hf82f8cb288f486df 16: 0x10356d9e1 - multitask::Ticker::tick::h6d97d8854e80a449 17: 0x10355f3a8 - bevy_tasks::task_pool::TaskPool::new_internal::{{closure}}::{{closure}}::h308cea1e75052d4d 18: 0x10355d0e0 - std::sys_common::backtrace::__rust_begin_short_backtrace::h8b6cd4880f6bb703 19: 0x103560740 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h97fdebce54bb0eae 20: 0x103568ae0 - as core::ops::function::FnOnce<()>>::call_once::h3c41bb15ddc6d2f8 21: 0x10355fd31 - std::panicking::try::do_call::h5090cfb14c9f3e26 22: 0x10355fddd - __rust_try 23: 0x10355fc57 - std::panicking::try::haeb52809323f0c0d 24: 0x103568b20 - std::panic::catch_unwind::hbb875c57657047c0 25: 0x10356058b - std::thread::Builder::spawn_unchecked::{{closure}}::h3d4b82ab4abbab9a 26: 0x103562fc1 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hc968fe1ea53fd55d 27: 0x10363a44d - std::sys::unix::thread::Thread::new::thread_start::h2fb48f1d6015d321 28: 0x7fff6ef8e109 - _pthread_start thread 'main' panicked at 'task has failed', /Users/nathan/.cargo/registry/src/github.com-1ecc6299db9ec823/multitask-0.2.0/src/lib.rs:166:48 stack backtrace: 0: 0x1036312ee - ::fmt::h26e8f1b884bae128 1: 0x10365931c - core::fmt::write::ha0b53fc066268c71 2: 0x10362d2f7 - std::io::Write::write_fmt::h410b83a4c70c6549 3: 0x103633865 - std::panicking::default_hook::{{closure}}::h70c11ad9e0ccd806 4: 0x1036335a2 - std::panicking::default_hook::hd9eda5765f18f021 5: 0x103633e1d - std::panicking::rust_panic_with_hook::h3fc8a110bc9d166f 6: 0x1036339f2 - rust_begin_unwind 7: 0x1036802bf - core::panicking::panic_fmt::h04439fd445b5f690 8: 0x10368014a - core::option::expect_failed::h2cafbfb636f224cf 9: 0x10353060e - core::option::Option::expect::h4af38fc383d523e3 10: 0x1035410bf - as core::future::future::Future>::poll::hfccfe3a81e05b3d4 11: 0x10354a94d - pollster::block_on::h5a5759537bd0f80b 12: 0x103543eef - bevy_tasks::task_pool::TaskPool::scope::h0ab204bf3103efea 13: 0x103559136 - bevy_ecs::schedule::parallel_executor::ExecutorStage::run::h99228f6fd022649a 14: 0x1035573ce - bevy_ecs::schedule::parallel_executor::ParallelExecutor::run::h92af107acc1fcf7b 15: 0x103510425 - bevy_app::app::App::update::h5eeea2d4a419de30 16: 0x102a89ed8 - bevy_winit::winit_runner::{{closure}}::h802261a791a154f8 17: 0x102a87e07 - as core::ops::function::FnMut>::call_mut::h2590a82a0ee67ab3 18: 0x102a78fb3 - as cart_tmp_winit::platform_impl::platform::app_state::EventHandler>::handle_nonuser_event::hf90fadb3b394ec56 19: 0x102adc930 - cart_tmp_winit::platform_impl::platform::app_state::Handler::handle_nonuser_event::hfad320581388a05f 20: 0x102ade6b8 - cart_tmp_winit::platform_impl::platform::app_state::AppState::cleared::hd885891802374bc0 21: 0x102ad35ee - cart_tmp_winit::platform_impl::platform::observer::control_flow_end_handler::h2feed6f29e1f8dce 22: 0x7fff34d1e335 - __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ 23: 0x7fff34d1e267 - __CFRunLoopDoObservers 24: 0x7fff34d1d92c - __CFRunLoopRun 25: 0x7fff34d1ce3e - CFRunLoopRunSpecific 26: 0x7fff33949abd - RunCurrentEventLoopInMode 27: 0x7fff339497d5 - ReceiveNextEventCommon 28: 0x7fff33949579 - _BlockUntilNextEventMatchingListInModeWithFilter 29: 0x7fff31f8f039 - _DPSNextEvent 30: 0x7fff31f8d880 - -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] 31: 0x7fff31f7f58e - -[NSApplication run] 32: 0x102b126d6 - <() as objc::message::MessageArguments>::invoke::hc48576eb4b61b053 33: 0x102b0fabd - objc::message::platform::send_unverified::h7d285a7ddf21bdb5 34: 0x102a8f0e4 - cart_tmp_winit::platform_impl::platform::event_loop::EventLoop::run_return::h7f36ed14bbebc8c5 35: 0x102a8f314 - cart_tmp_winit::platform_impl::platform::event_loop::EventLoop::run::hc3616a3086e7609d 36: 0x102a8ffc3 - cart_tmp_winit::event_loop::EventLoop::run::hf5fb97f3bc04ad63 37: 0x102a88fc3 - bevy_winit::run::hebf1066465722a28 38: 0x102a73ed9 - bevy_winit::winit_runner::hca7352ca62640c28 39: 0x102a9048a - core::ops::function::Fn::call::hbc03c6574fa76d81 40: 0x1034f00e5 - as core::ops::function::Fn>::call::h62bf441dafdeaf1e 41: 0x103510619 - bevy_app::app::App::run::he1b90bd6cdafa293 42: 0x1034ef650 - bevy_app::app_builder::AppBuilder::run::h377b5aaf85f84997 43: 0x1021fb9b2 - ui::main::hb19c686ca354649c 44: 0x1021f847e - std::rt::lang_start::{{closure}}::hbe0da18a441104b2 45: 0x1036340e9 - std::rt::lang_start_internal::hbec44ff873a30990 46: 0x1021f8461 - std::rt::lang_start::h8f579f52d625e265 47: 0x1021fbeb2 - main