X11_BACKEND.lock() fails

[L3P3]

Description

When I try to run the last version of lapce, I get:

thread main panicked at <unknown> | file://.//usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/floem-winit-0.29.4/src/platform_impl/linux/mod.rs:787:62
   0: lapce_app::app::logging::panic_hook::{{closure}}
   1: std::panicking::rust_panic_with_hook
   2: std::panicking::begin_panic_handler::{{closure}}
   3: std::sys_common::backtrace::__rust_end_short_backtrace
   4: rust_begin_unwind
   5: core::panicking::panic_fmt
   6: core::result::unwrap_failed
   7: floem_winit::platform_impl::platform::EventLoop<T>::new
   8: lapce_app::app::launch
   9: std::sys_common::backtrace::__rust_begin_short_backtrace
  10: main
  11: <unknown>
  12: __libc_start_main
  13: _start

The unwrap in question is that one behind X11_BACKEND.lock(). Any idea why this happens?

OS and window mananger

Debian testing i386/qemu, mate desktop, x11

Winit version

0.29.4