Thread panicked: Time shouldn't move backwards

[nathanleiby]

I see this issue periodically.

It seems like it might occur when you exit / re-enter the app, close the laptop lid, something like that? But I don't have a solid repro case.

It may potentially be an issue related to my hackily in vendored egui, seeing as it stems from emath, which is an egui math library.

thread 'main' panicked at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/emath-0.28.1/src/history.rs:129:13:
Time shouldn't move backwards
stack backtrace:
   0: rust_begin_unwind
             at /rustc/051478957371ee0084a7c0913941d2a8c4757bb9/library/std/src/panicking.rs:652:5
   1: core::panicking::panic_fmt
             at /rustc/051478957371ee0084a7c0913941d2a8c4757bb9/library/core/src/panicking.rs:72:14
   2: emath::history::History<T>::add
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/emath-0.28.1/src/history.rs:129:13
   3: egui::input_state::PointerState::begin_frame
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/egui-0.28.1/src/input_state.rs:938:13
   4: egui::input_state::InputState::begin_frame
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/egui-0.28.1/src/input_state.rs:221:23
   5: egui::context::ContextImpl::begin_frame_mut
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/egui-0.28.1/src/context.rs:449:26
   6: egui::context::Context::begin_frame::{{closure}}
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/egui-0.28.1/src/context.rs:777:26
   7: egui::context::Context::write
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/egui-0.28.1/src/context.rs:723:9
   8: egui::context::Context::begin_frame
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/egui-0.28.1/src/context.rs:777:9
   9: egui::context::Context::run
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/egui-0.28.1/src/context.rs:752:9
  10: egui_miniquad::EguiMq::run
             at ./egui_miniquad/src/lib.rs:185:27
  11: egui_macroquad::Egui::ui
             at ./egui_macroquad/src/lib.rs:87:9
  12: egui_macroquad::ui
             at ./egui_macroquad/src/lib.rs:100:5
  13: macroix::ui::UI::render
             at ./src/ui.rs:23:9
  14: macroix::amain::{{closure}}
             at ./src/main.rs:118:9
  15: macroix::main::{{closure}}
             at ./src/main.rs:49:1
  16: macroquad::exec::resume
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/macroquad-0.4.12/src/exec.rs:72:11
  17: <macroquad::Stage as miniquad::event::EventHandler>::draw::{{closure}}
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/macroquad-0.4.12/src/lib.rs:721:24
  18: <macroquad::Stage as miniquad::event::EventHandler>::draw::maybe_unwind
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/macroquad-0.4.12/src/lib.rs:712:21
  19: <macroquad::Stage as miniquad::event::EventHandler>::draw
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/macroquad-0.4.12/src/lib.rs:717:26
  20: miniquad::native::macos::define_opengl_view_class::draw_rect
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/miniquad-0.4.5/src/native/macos.rs:663:13
  21: <unknown>
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  36: <(A,B,C,D) as objc::message::MessageArguments>::invoke
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc-0.2.7/src/message/mod.rs:128:17
  37: objc::message::platform::send_unverified
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc-0.2.7/src/message/apple/mod.rs:27:9
  38: objc::message::send_message
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc-0.2.7/src/message/mod.rs:178:5
  39: miniquad::native::macos::run
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc-0.2.7/src/macros.rs:142:15
  40: miniquad::start
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/miniquad-0.4.5/src/lib.rs:384:9
  41: macroquad::Window::from_config
             at /Users/nathanleiby/.cargo/registry/src/index.crates.io-6f17d22bba15001f/macroquad-0.4.12/src/lib.rs:840:9
  42: macroix::main
             at ./src/main.rs:49:1
  43: core::ops::function::FnOnce::call_once
             at /rustc/051478957371ee0084a7c0913941d2a8c4757bb9/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.