Basic app crashing on Windows #1472

omichel · 2025-01-27T20:04:13Z

omichel
Jan 27, 2025

I wrote a super simple hello world app which crashes on Windows 11 when using the window.ipc.postMessage() from Javascript.

Here is my Cargo.toml:

[package]
name = "cresus-native"
version = "0.1.0"
edition = "2021"

[dependencies]
wry = "0.48"
winit = "0.30"

And main.rs:

use winit::{
    application::ApplicationHandler,
    event::WindowEvent,
    event_loop::{ActiveEventLoop, EventLoop},
    window::{Window, WindowId},
};
use wry::{Result, WebViewBuilder};

fn main() -> Result<()> {
    #[derive(Default)]
    struct App {
        window: Option<Window>,
        webview: Option<wry::WebView>,
    }

    impl ApplicationHandler for App {
        fn resumed(&mut self, event_loop: &ActiveEventLoop) {
            let window_attributes = Window::default_attributes()
                .with_title("Crésus Home")
                .with_inner_size(winit::dpi::LogicalSize::new(1400, 1010));
            let window = event_loop.create_window(window_attributes).unwrap();
            let webview = WebViewBuilder::new()
                .with_url("data:text/html,<html><body><h1>Hello world!</h1><button onclick=\"sendMessage()\">Send Message</button><script>function sendMessage() { window.ipc.postMessage('Hello from JavaScript'); } window.external.receiveMessage = function(message) { alert('Received message from Rust: ' + message); } </script></body></html>")
                .with_ipc_handler(|s| {
                    dbg!(s);
                })
                .build(&window)
                .unwrap();
            self.window = Some(window);
            self.webview = Some(webview);
        }

        fn window_event(
            &mut self,
            event_loop: &ActiveEventLoop,
            _window_id: WindowId,
            event: WindowEvent,
        ) {
            if let WindowEvent::CloseRequested = event {
                event_loop.exit();
            }
        }
    }

    let event_loop = EventLoop::new().unwrap();
    let mut app = App::default();
    event_loop.run_app(&mut app).unwrap();

    Ok(())
}

Everything works nicely until I click on the Send Message button and the app crashes with the following message in the console:

PS C:\Users\Olivi\repos\cresus-native> cargo run
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
     Running `target\debug\cresus-native.exe`
thread 'main' panicked at C:\Users\Olivi\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wry-0.48.1\src\webview2\mod.rs:812:58:
called `Result::unwrap()` on an `Err` value: http::Error(InvalidUri(Empty))
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at core\src\panicking.rs:223:5:
panic in a function that cannot unwind
stack backtrace:
   0:     0x7ff7f51a2371 - std::backtrace_rs::backtrace::dbghelp64::trace
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\..\..\backtrace\src\backtrace\dbghelp64.rs:91
   1:     0x7ff7f51a2371 - std::backtrace_rs::backtrace::trace_unsynchronized
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\..\..\backtrace\src\backtrace\mod.rs:66
   2:     0x7ff7f51a2371 - std::sys::backtrace::_print_fmt
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\sys\backtrace.rs:66
   3:     0x7ff7f51a2371 - std::sys::backtrace::impl$0::print::impl$0::fmt
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\sys\backtrace.rs:39
   4:     0x7ff7f51b50da - core::fmt::rt::Argument::fmt
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/core\src\fmt\rt.rs:177
   5:     0x7ff7f51b50da - core::fmt::write
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/core\src\fmt\mod.rs:1189
   6:     0x7ff7f519f0d7 - std::io::Write::write_fmt<std::sys::pal::windows::stdio::Stderr>
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\io\mod.rs:1884
   7:     0x7ff7f51a21b5 - std::sys::backtrace::BacktraceLock::print
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\sys\backtrace.rs:42
   8:     0x7ff7f51a3815 - std::panicking::default_hook::closure$1
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\panicking.rs:268
   9:     0x7ff7f51a35f4 - std::panicking::default_hook
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\panicking.rs:295
  10:     0x7ff7f51a3ea3 - std::panicking::rust_panic_with_hook
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\panicking.rs:801
  11:     0x7ff7f51a3cf2 - std::panicking::begin_panic_handler::closure$0
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\panicking.rs:667
  12:     0x7ff7f51a2abf - std::sys::backtrace::__rust_end_short_backtrace<std::panicking::begin_panic_handler::closure_env$0,never$>
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\sys\backtrace.rs:170
  13:     0x7ff7f51a392e - std::panicking::begin_panic_handler
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\panicking.rs:665
  14:     0x7ff7f51bc315 - core::panicking::panic_nounwind_fmt
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/core\src\intrinsics\mod.rs:3535
  15:     0x7ff7f51bc3c3 - core::panicking::panic_nounwind
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/core\src\panicking.rs:223
  16:     0x7ff7f51bc4e3 - core::panicking::panic_cannot_unwind
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/core\src\panicking.rs:315
  17:     0x7ff7f50e46e6 - webview2_com_sys::Microsoft::Web::WebView2::Win32::impl$1067::new::Invoke<webview2_com::callback::WebMessageReceivedEventHandler_Impl,-1>
                               at C:\Users\Olivi\.cargo\registry\src\index.crates.io-6f17d22bba15001f\webview2-com-sys-0.34.0\src\Microsoft.rs:43228
  18:     0x7ff83996f730 - _CxxFrameHandler3
  19:     0x7ff8399633d8 - is_exception_typeof
  20:     0x7ff8517c3846 - RtlCaptureContext2
  21:     0x7ff7f50e4695 - webview2_com_sys::Microsoft::Web::WebView2::Win32::impl$1067::new::Invoke<webview2_com::callback::WebMessageReceivedEventHandler_Impl,-1>
                               at C:\Users\Olivi\.cargo\registry\src\index.crates.io-6f17d22bba15001f\webview2-com-sys-0.34.0\src\Microsoft.rs:43241
  22:     0x7fff6dcdf480 - CreateWebViewEnvironmentWithOptionsInternal
  23:     0x7fff6dcdf317 - CreateWebViewEnvironmentWithOptionsInternal
  24:     0x7fff6dd4736a - DllCanUnloadNow
  25:     0x7fff6dd49381 - DllCanUnloadNow
  26:     0x7fff6df39e3e - GetHandleVerifier
  27:     0x7fff6ddb11d6 - DllCanUnloadNow
  28:     0x7fff6ddbd02a - DllCanUnloadNow
  29:     0x7fff6ddb1fe5 - DllCanUnloadNow
  30:     0x7fff6ddb0027 - DllCanUnloadNow
  31:     0x7fff6ddafc2b - DllCanUnloadNow
  32:     0x7fff6ddbd02a - DllCanUnloadNow
  33:     0x7fff6dda207f - DllCanUnloadNow
  34:     0x7fff6dda24ec - DllCanUnloadNow
  35:     0x7fff6de0ce94 - DllCanUnloadNow
  36:     0x7fff6dc9a297 - CreateWebViewEnvironmentWithOptionsInternal
  37:     0x7fff6dc9a297 - CreateWebViewEnvironmentWithOptionsInternal
  38:     0x7fff6dda484f - DllCanUnloadNow
  39:     0x7fff6dd9c1b4 - DllCanUnloadNow
  40:     0x7fff6dd2a808 - DllCanUnloadNow
  41:     0x7fff6dd2a666 - DllCanUnloadNow
  42:     0x7fff6dd29e9d - DllCanUnloadNow
  43:     0x7fff6df4594c - GetHandleVerifier
  44:     0x7fff6df45830 - GetHandleVerifier
  45:     0x7fff6de78bef - DllCanUnloadNow
  46:     0x7ff84fbc5801 - CallWindowProcW
  47:     0x7ff84fbc334d - IsWindowUnicode
  48:     0x7ff7f50a8149 - winit::platform_impl::windows::event_loop::EventLoop<tuple$<> >::dispatch_peeked_messages<tuple$<> >
                               at C:\Users\Olivi\.cargo\registry\src\index.crates.io-6f17d22bba15001f\winit-0.30.8\src\platform_impl\windows\event_loop.rs:419
  49:     0x7ff7f50a7b4d - winit::platform_impl::windows::event_loop::EventLoop<tuple$<> >::run_on_demand<tuple$<>,winit::event_loop::impl$6::run_app::closure_env$0<tuple$<>,cresus_native::main::App> >
                               at C:\Users\Olivi\.cargo\registry\src\index.crates.io-6f17d22bba15001f\winit-0.30.8\src\platform_impl\windows\event_loop.rs:277
  50:     0x7ff7f50a8676 - winit::platform_impl::windows::event_loop::EventLoop<tuple$<> >::run<tuple$<>,winit::event_loop::impl$6::run_app::closure_env$0<tuple$<>,cresus_native::main::App> >
                               at C:\Users\Olivi\.cargo\registry\src\index.crates.io-6f17d22bba15001f\winit-0.30.8\src\platform_impl\windows\event_loop.rs:233
  51:     0x7ff7f50a1972 - winit::event_loop::EventLoop<tuple$<> >::run_app<tuple$<>,cresus_native::main::App>
                               at C:\Users\Olivi\.cargo\registry\src\index.crates.io-6f17d22bba15001f\winit-0.30.8\src\event_loop.rs:265
  52:     0x7ff7f50a9dbd - cresus_native::main
                               at C:\Users\Olivi\repos\cresus-native\src\main.rs:49
  53:     0x7ff7f5079793 - core::ops::function::FnOnce::call_once<enum2$<core::result::Result<tuple$<>,enum2$<wry::error::Error> > > (*)(),tuple$<> >
                               at C:\Users\Olivi\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\ops\function.rs:250
  54:     0x7ff7f5066016 - std::sys::backtrace::__rust_begin_short_backtrace<enum2$<core::result::Result<tuple$<>,enum2$<wry::error::Error> > > (*)(),enum2$<core::result::Result<tuple$<>,enum2$<wry::error::Error> > > >
                               at C:\Users\Olivi\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\sys\backtrace.rs:154
  55:     0x7ff7f50662b6 - std::rt::lang_start::closure$0<enum2$<core::result::Result<tuple$<>,enum2$<wry::error::Error> > > >
                               at C:\Users\Olivi\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\rt.rs:195
  56:     0x7ff7f519ccbc - std::rt::lang_start_internal::closure$1
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\rt.rs:174
  57:     0x7ff7f519ccbc - std::panicking::try::do_call
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\panicking.rs:557
  58:     0x7ff7f519ccbc - std::panicking::try
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\panicking.rs:520
  59:     0x7ff7f519ccbc - std::panic::catch_unwind
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\panic.rs:358
  60:     0x7ff7f519ccbc - std::rt::lang_start_internal
                               at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869\library/std\src\rt.rs:174
  61:     0x7ff7f506628a - std::rt::lang_start<enum2$<core::result::Result<tuple$<>,enum2$<wry::error::Error> > > >
                               at C:\Users\Olivi\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\std\src\rt.rs:194
  62:     0x7ff7f50aa6a9 - main
  63:     0x7ff7f51ba2b0 - invoke_main
                               at D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:78
  64:     0x7ff7f51ba2b0 - __scrt_common_main_seh
                               at D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288
  65:     0x7ff84ff5e8d7 - BaseThreadInitThunk
  66:     0x7ff85177fbcc - RtlUserThreadStart
thread caused non-unwinding panic. aborting.
error: process didn't exit successfully: `target\debug\cresus-native.exe` (exit code: 0xc0000409, STATUS_STACK_BUFFER_OVERRUN)

I am doing anything wrong, or is that a bug?

omichel · 2025-01-27T20:12:46Z

omichel
Jan 27, 2025
Author

I just found a fix: replacing with_url() with the equivalent .with_html() fixed the crash.

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Basic app crashing on Windows #1472

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Basic app crashing on Windows #1472

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omichel Jan 27, 2025 Author

omichel
Jan 27, 2025

omichel
Jan 27, 2025
Author