Panic in Iced when programmatically modifying text with an active selection and immediately pasting

backtrace

thread 'main' panicked at 'end drain index (is 63) should be <= len (is 8)', src\liballoc\vec.rs:1331:13
stack backtrace:
   0: backtrace::backtrace::trace_unsynchronized
             at C:\Users\VssAdministrator\.cargo\registry\src\github.com-1ecc6299db9ec823\backtrace-0.3.46\src\backtrace\mod.rs:66
   1: std::sys_common::backtrace::_print_fmt
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\sys_common\backtrace.rs:78
   2: std::sys_common::backtrace::_print::{{impl}}::fmt
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\sys_common\backtrace.rs:59
   3: core::fmt::write
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libcore\fmt\mod.rs:1069
   4: std::io::Write::write_fmt<std::sys::windows::stdio::Stderr>
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\io\mod.rs:1504
   5: std::sys_common::backtrace::_print
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\sys_common\backtrace.rs:62
   6: std::sys_common::backtrace::print
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\sys_common\backtrace.rs:49
   7: std::panicking::default_hook::{{closure}}
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\panicking.rs:198
   8: std::panicking::default_hook
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\panicking.rs:218
   9: std::panicking::rust_panic_with_hook
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\panicking.rs:511
  10: std::panicking::begin_panic_handler
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\panicking.rs:419
  11: core::panicking::panic_fmt
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libcore\panicking.rs:111
  12: alloc::vec::{{impl}}::drain::end_assert_failed
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\liballoc\vec.rs:1331
  13: alloc::vec::Vec<alloc::string::String>::drain<alloc::string::String,core::ops::range::Range<usize>>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\liballoc\vec.rs:1338
  14: alloc::vec::Vec<alloc::string::String>::splice<alloc::string::String,core::ops::range::Range<usize>,core::iter::sources::Empty<alloc::string::String>>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\liballoc\vec.rs:2247
  15: iced_native::widget::text_input::value::Value::remove_many
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\native\src\widget\text_input\value.rs:120
  16: iced_native::widget::text_input::editor::Editor::paste
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\native\src\widget\text_input\editor.rs:36
  17: iced_native::widget::text_input::{{impl}}::on_event<paste_panic::Message,iced_graphics::renderer::Renderer<iced_wgpu::backend::Backend>>
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\native\src\widget\text_input.rs:448
  18: iced_native::user_interface::UserInterface<paste_panic::Message, iced_graphics::renderer::Renderer<iced_wgpu::backend::Backend>>::update<paste_panic::Message,iced_graphics::renderer::Renderer<iced_wgpu::backend::Backend>,alloc::vec::Drain<iced_native::eve
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\native\src\user_interface.rs:196
  19: iced_native::program::state::State<iced::application::Instance<paste_panic::App>>::update<iced::application::Instance<paste_panic::App>>
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\native\src\program\state.rs:123
  20: iced_winit::application::run::{{closure}}::{{closure}}<iced::application::Instance<paste_panic::App>,iced::executor::platform::Default,iced_wgpu::window::compositor::Compositor>
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\winit\src\application.rs:188
  21: iced_futures::executor::Executor::enter<futures_executor::thread_pool::ThreadPool,core::option::Option<iced_futures::command::Command<paste_panic::Message>>,closure-0>
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\futures\src\executor.rs:62
  22: iced::executor::platform::{{impl}}::enter<core::option::Option<iced_futures::command::Command<paste_panic::Message>>,closure-0>
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\src\executor.rs:43
  23: iced_futures::runtime::Runtime<iced_native::hasher::Hasher, iced_native::event::Event, iced::executor::platform::Default, iced_winit::proxy::Proxy<paste_panic::Message>, paste_panic::Message>::enter<iced_native::hasher::Hasher,iced_native::event::Event,ic
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\futures\src\runtime.rs:58
  24: iced_winit::application::run::{{closure}}<iced::application::Instance<paste_panic::App>,iced::executor::platform::Default,iced_wgpu::window::compositor::Compositor>
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\winit\src\application.rs:187
  25: winit::platform_impl::platform::event_loop::{{impl}}::run_return::{{closure}}<paste_panic::Message,closure-1>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop.rs:200
  26: alloc::boxed::{{impl}}::call_mut<(winit::event::Event<paste_panic::Message>, mut winit::event_loop::ControlFlow*),FnMut<(winit::event::Event<paste_panic::Message>, mut winit::event_loop::ControlFlow*)>>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\liballoc\boxed.rs:1015
  27: winit::platform_impl::platform::event_loop::runner::{{impl}}::call_event_handler::{{closure}}<paste_panic::Message>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop\runner.rs:239
  28: std::panic::{{impl}}::call_once<(),closure-0>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panic.rs:318
  29: std::panicking::try::do_call<std::panic::AssertUnwindSafe<closure-0>,()>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panicking.rs:331
  30: std::panicking::try::do_catch<std::panic::AssertUnwindSafe<closure-0>,()>
  31: std::panicking::try<(),std::panic::AssertUnwindSafe<closure-0>>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panicking.rs:274
  32: std::panic::catch_unwind<std::panic::AssertUnwindSafe<closure-0>,()>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panic.rs:394
  33: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<paste_panic::Message>::catch_unwind<paste_panic::Message,(),closure-0>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop\runner.rs:150
  34: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<paste_panic::Message>::call_event_handler<paste_panic::Message>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop\runner.rs:233
  35: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<paste_panic::Message>::move_state_to<paste_panic::Message>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop\runner.rs:319
  36: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<paste_panic::Message>::main_events_cleared<paste_panic::Message>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop\runner.rs:225
  37: winit::platform_impl::platform::event_loop::flush_paint_messages<paste_panic::Message>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop.rs:663
  38: winit::platform_impl::platform::event_loop::thread_event_target_callback::{{closure}}<paste_panic::Message>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop.rs:1938
  39: std::panic::{{impl}}::call_once<isize,closure-0>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panic.rs:318
  40: std::panicking::try::do_call<std::panic::AssertUnwindSafe<closure-0>,isize>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panicking.rs:331
  41: std::panicking::try::do_catch<std::panic::AssertUnwindSafe<closure-0>,()>
  42: std::panicking::try<isize,std::panic::AssertUnwindSafe<closure-0>>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panicking.rs:274
  43: std::panic::catch_unwind<std::panic::AssertUnwindSafe<closure-0>,isize>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panic.rs:394
  44: winit::platform_impl::platform::event_loop::runner::EventLoopRunner<paste_panic::Message>::catch_unwind<paste_panic::Message,isize,closure-0>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop\runner.rs:150
  45: winit::platform_impl::platform::event_loop::thread_event_target_callback<paste_panic::Message>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop.rs:2120
  46: DefSubclassProc
  47: DefSubclassProc
  48: CallWindowProcW
  49: DispatchMessageW
  50: IsWindowVisible
  51: KiUserCallbackDispatcher
  52: NtUserDispatchMessage
  53: DispatchMessageW
  54: winit::platform_impl::platform::event_loop::EventLoop<paste_panic::Message>::run_return<paste_panic::Message,closure-1>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop.rs:215
  55: winit::platform_impl::platform::event_loop::EventLoop<paste_panic::Message>::run<paste_panic::Message,closure-1>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\platform_impl\windows\event_loop.rs:185
  56: winit::event_loop::EventLoop<paste_panic::Message>::run<paste_panic::Message,closure-1>
             at C:\Users\mtken\.cargo\registry\src\github.com-1ecc6299db9ec823\winit-0.22.2\src\event_loop.rs:149
  57: iced_winit::application::run<iced::application::Instance<paste_panic::App>,iced::executor::platform::Default,iced_wgpu::window::compositor::Compositor>
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\winit\src\application.rs:181
  58: iced::application::Application::run<paste_panic::App>
             at C:\Users\mtken\.cargo\git\checkouts\iced-9e73d2fbe1fce35a\46ce3a1\src\application.rs:229
  59: paste_panic::main
             at .\src\main.rs:75
  60: std::rt::lang_start::{{closure}}<()>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\rt.rs:67
  61: std::rt::lang_start_internal::{{closure}}
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\rt.rs:52
  62: std::panicking::try::do_call
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\panicking.rs:331
  63: std::panicking::try
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\panicking.rs:274
  64: std::panic::catch_unwind
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\panic.rs:394
  65: std::rt::lang_start_internal
             at /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7\/src\libstd\rt.rs:51
  66: std::rt::lang_start<()>
             at C:\Users\mtken\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\rt.rs:67
  67: main
  68: invoke_main
             at f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:78
  69: __scrt_common_main_seh
             at f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283
  70: BaseThreadInitThunk
  71: RtlUserThreadStart
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
error: process didn't exit successfully: `target\debug\paste-panic.exe` (exit code: 101)

Cargo.toml

[package]
name = "paste-panic"
version = "0.1.0"
authors = ["mtkennerly <mtkennerly@gmail.com>"]
edition = "2018"

[dependencies]
# iced = "0.1.1"
# iced_native = "0.2.2"

iced = { git = "https://github.com/hecrj/iced" }
iced_native = { git = "https://github.com/hecrj/iced" }

src.rs

use iced::{executor, text_input, Application, Command, Element, Subscription, TextInput};

#[derive(Debug, Clone)]
enum Message {
    Edit(String),
    Event(iced_native::Event),
}

#[derive(Default)]
struct App {
    text: String,
    input: text_input::State,
}

impl Application for App {
    type Executor = executor::Default;
    type Message = Message;
    type Flags = ();

    fn new(_flags: ()) -> (Self, Command<Message>) {
        (
            Self {
                text: "Select some text near the end, press ctrl+x, then try ctrl+v and it'll panic".to_owned(),
                ..Default::default()
            },
            Command::none(),
        )
    }

    fn title(&self) -> String {
        "Paste Panic".to_string()
    }

    fn update(&mut self, message: Message) -> Command<Message> {
        match message {
            Message::Edit(text) => {
                self.text = text;
                Command::none()
            }
            Message::Event(event) => {
                if let iced_native::Event::Keyboard(key) = event {
                    // iced v0.1.1 and iced_native v0.2.2:
                    // if let iced_native::input::keyboard::Event::Input { state, key_code, modifiers } = key {
                    //     if key_code == iced_native::input::keyboard::KeyCode::X && state == iced_native::input::ButtonState::Pressed && modifiers.control {
                    //         self.text = "modified".to_owned();
                    //     }
                    // }

                    // iced/iced_native master:
                    if let iced_native::keyboard::Event::KeyPressed {
                        key_code,
                        modifiers,
                    } = key
                    {
                        if key_code == iced_native::keyboard::KeyCode::X && modifiers.control {
                            self.text = "modified".to_owned();
                        }
                    }
                }
                Command::none()
            }
        }
    }

    fn subscription(&self) -> Subscription<Message> {
        iced_native::subscription::events().map(Message::Event)
    }

    fn view(&mut self) -> Element<Message> {
        TextInput::new(&mut self.input, "", &self.text, Message::Edit).into()
    }
}

fn main() {
    App::run(iced::Settings::default())
}