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termion
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Opened by Henri Lunnikivi@hegza

Reproducible crash on mouse-dragging from termion window to top of screen

Platform: Lenovo X220, Arch Linux, Awesome window manager, urxvt -terminal.

Tested with applications depending on termion: void, smith.

Reproduction:

  1. Start holding a mouse button anywhere in the terminal hosting a termion application.
  2. Touch top of the entire screen, while holding a mouse button.
  3. -> Application exits with exit code 101, which is rustc for "panic". Applications do not get a panic-backtrace.

More info:

  • Original issue I filed in void.
  • Other edges of screen do not cause the issue. It seems to be specifically the point where y=0.
  • Based on my investigation, the crash happens in void after calling either std::io::Write::flush() or after setting std_out = something, where std_out is of some compound termion type, like MouseTerminal<RawTerminal<AlternateScreen<Stdout>>>. Application crashes consistently, and very mysteriously at the point where the function that calls the above is supposed to return.
  • This is the function in void, that causes a crash as it returns.
Edited by Henri Lunnikivi