segfault: multiple windows close crashes program

[Mikopet]

I encountered a segfault during messing around with multiple windows.

The most stable way I found to reproduce it is:

• run Verso
• press new window button
• after new window spawned, press it again on the first window. wait for the 3rd window.
• close one of the last two windows with system close (not from verso-panel)

---

It seems it's something with wayland. (my system is an Ubuntu fork, wayland, plasma 6)

==160743== Process terminating with default action of signal 11 (SIGSEGV)
==160743==  Access not within mapped region at address 0x17C
==160743==    at 0x766A885: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.22.0)
==160743==    by 0x766A9F4: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.22.0)
==160743==    by 0x766C449: wl_proxy_marshal_array_flags (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.22.0)
==160743==    by 0x766CF5E: wl_proxy_marshal_flags (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.22.0)
==160743==    by 0x8D42367: ??? (in /usr/lib/x86_64-linux-gnu/libEGL_mesa.so.0.0.0)
==160743==    by 0x8D2A1D7: ??? (in /usr/lib/x86_64-linux-gnu/libEGL_mesa.so.0.0.0)
==160743==    by 0x7694BC: _ZN4core3ptr83drop_in_place$LT$glutin..surface..Surface$LT$glutin..surface..WindowSurface$GT$$GT$17h8172f748c57bb4b5E.llvm.18333104610557856462 (in /home/mikopet/Git/verso/verso/target/release/verso)
==160743==    by 0x769C78: <hashbrown::raw::RawTable<T,A> as core::ops::drop::Drop>::drop (in /home/mikopet/Git/verso/verso/target/release/verso)
==160743==    by 0x77198C: core::ptr::drop_in_place<core::option::Option<verso::verso::Verso>> (in /home/mikopet/Git/verso/verso/target/release/verso)
==160743==    by 0x776837: verso::main (in /home/mikopet/Git/verso/verso/target/release/verso)
==160743==    by 0x79F905: std::sys_common::backtrace::__rust_begin_short_backtrace (in /home/mikopet/Git/verso/verso/target/release/verso)
==160743==    by 0x7B78F7: _ZN3std2rt10lang_start28_$u7b$$u7b$closure$u7d$$u7d$17hc583dbad078eb90aE.llvm.5640221289294703489 (in /home/mikopet/Git/verso/verso/target/release/verso)

valgrind.log