Crash in load_pixbuf
This happened when the network was congested and an unrelated sshfs filesystem was mounted (sshfs will block for looong times, and applications which have no reason to get blocked on the particular mount point still do).
30809bcc on Fedora 28.
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', libcore/option.rs:355:21
stack backtrace:
0: 0x55dc31503b8f - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h7376524adbd992ac
1: 0x55dc31511827 - std::sys_common::backtrace::print::h23a2fcc676239a64
2: 0x55dc3150a03f - std::panicking::default_hook::{{closure}}::hf918faa1fef4faf1
3: 0x55dc31509da4 - std::panicking::default_hook::hb3517212cbeaee8d
4: 0x55dc3150a71e - std::panicking::rust_panic_with_hook::hef18d07c33eb725f
5: 0x55dc3150a2c1 - std::panicking::continue_panic_fmt::h3f92b0b1386b9b5e
6: 0x55dc3150a1a5 - rust_begin_unwind
7: 0x55dc315280ec - core::panicking::panic_fmt::hf131eae6172f8504
8: 0x55dc3152801b - core::panicking::panic::h6b8435f395e39771
9: 0x55dc312a3887 - tree_magic::from_filepath::h35e419a17cbc9718
10: 0x55dc311332ac - fractal_gtk::widgets::image::load_pixbuf::h5ae41fcf6314e6d6
11: 0x55dc310a955f - fractal_gtk::widgets::image::Image::load_async::{{closure}}::h1e8ed02575f46e14
12: 0x55dc314e87ce - gtk::signal::trampoline::h2b5b4da8afe2641c
13: 0x7f826e6b5350 - <unknown>
14: 0x7f826e6b488c - g_main_context_dispatch
15: 0x7f826e6b4c57 - <unknown>
16: 0x7f826e6b4cef - g_main_context_iteration
17: 0x7f826cdfa724 - g_application_run
at /usr/src/debug/glib2-2.56.3-2.fc28.x86_64/gio/gapplication.c:2470
18: 0x55dc3104465e - <O as gio::application::ApplicationExtManual>::run::h6eec6f35a4cc26cc
19: 0x55dc3112be8e - fractal_gtk::main::hf204ceed3e615f0c
20: 0x55dc31089476 - std::rt::lang_start::{{closure}}::h16a8a2d8b85bfe2d
21: 0x55dc3150a142 - std::panicking::try::do_call::hdcfe03450118aa82
22: 0x55dc315193d9 - __rust_maybe_catch_panic
23: 0x55dc314f05ea - std::rt::lang_start_internal::h77444e0155948532
24: 0x55dc3112c144 - main
25: 0x7f826afdb11a - __libc_start_main
26: 0x55dc3100c4e9 - _start
27: 0x0 - <unknown>