Tab crash when searching

[Zarloc]

Describe the bug

When pressing CTRL-SHIFT-F with the search bar already open crash the tab.
The bug appear when updated from 20210203-095643-70a364eb to 20210314-114017-04b7cedd-41-ga5f4803b.

Environment

• OS: Windows 10 20H2 (19042.867)
• Version: wezterm 20210314-114017-04b7cedd-41-ga5f4803b
• The active keyboard layout name ENG INTL

To Reproduce

Open any tab, press CTRL-SHIFT-F, the search bar appear.
Press CTRL-SHIFT-F another time, the tab crash

Configuration

Crash occur with or without config file.

Trace log

 2021-03-22T13:42:23.800Z TRACE wezterm_gui::termwindow::keyevent  > key_event KeyEvent { key: Char('F'), modifiers: CTRL, raw_key: Some(Char('F')), raw_modifiers: CTRL, raw_code: Some(70), repeat_count: 1, key_is_down: true }
 2021-03-22T13:42:23.800Z DEBUG mux                                > removing pane 0
 2021-03-22T13:42:23.800Z DEBUG mux                                > killing pane 0
 2021-03-22T13:42:23.800Z DEBUG mux::localpane                     > killing process in pane 0, state is Running { child: WinChild { proc: Mutex { data: OwnedHandle { handle: 0x274, handle_type: Unknown } } }, killed: false }
 2021-03-22T13:42:23.800Z DEBUG mux::localpane                     > child terminated, new state is Dead
 2021-03-22T13:42:23.800Z DEBUG mux                                > prune_dead_windows: window is now empty
 2021-03-22T13:42:23.800Z TRACE mux                                > tab 0 is dead
 2021-03-22T13:42:23.800Z DEBUG mux                                > remove_tab_internal tab 0
 2021-03-22T13:42:23.800Z DEBUG mux                                > remove_window_internal 0
 2021-03-22T13:42:23.800Z TRACE window::os::windows::window        > WindowOps::invalidate calling InvalidateRect
 2021-03-22T13:42:23.800Z DEBUG mux                                > removing pane 0
 2021-03-22T13:42:23.800Z DEBUG wezterm_gui::termwindow::render    > paint_impl before call_draw elapsed=10µs
 2021-03-22T13:42:23.801Z DEBUG wezterm_gui::termwindow::render    > paint_impl elapsed=1.0392ms
 2021-03-22T13:42:23.835Z TRACE wezterm_gui::termwindow            > Setting focus to false
 2021-03-22T13:42:23.835Z TRACE window::os::windows::window        > WindowOps::invalidate calling InvalidateRect
 2021-03-22T13:42:23.974Z TRACE mux                                > read_pty EOF: pane_id 0
 2021-03-22T13:42:23.986Z TRACE async_std::task::builder           > block_on
 2021-03-22T13:42:23.986Z TRACE async_io::driver                   > block_on()
 2021-03-22T13:42:23.986Z TRACE async_io::driver                   > block_on: sleep until notification

[github-actions]

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