Fix for panic:
thread 'main' panicked at 'A FontStackToken was leaked. Did you call .pop()?', D:\Repos\GitHub\imgui-rs\src\stacks.rs:178:13
stack backtrace:
0: backtrace::backtrace::trace_unsynchronized
at C:\Users\VssAdministrator\.cargo\registry\src\github.com-1ecc6299db9ec823\backtrace-0.3.34\src\backtrace\mod.rs:66
1: std::sys_common::backtrace::_print
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\sys_common\backtrace.rs:47
2: std::sys_common::backtrace::print
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\sys_common\backtrace.rs:36
3: std::panicking::default_hook::{{closure}}
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\panicking.rs:200
4: std::panicking::default_hook
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\panicking.rs:214
5: std::panicking::rust_panic_with_hook
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\panicking.rs:477
6: std::panicking::begin_panic
7: <imgui::stacks::FontStackToken as core::ops::drop::Drop>::drop
8: imgui:🪟:Window::build
9: <std::sync::mpsc::sync::Packet<T> as core::ops::drop::Drop>::drop
10: <std::sys_common::poison::PoisonError<T> as core::fmt::Debug>::fmt
11: std::rt::lang_start_internal::{{closure}}
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\rt.rs:49
12: std::panicking::try::do_call<closure-0,i32>
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\panicking.rs:296
13: panic_unwind::__rust_maybe_catch_panic
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libpanic_unwind\lib.rs:80
14: std::panicking::try
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\panicking.rs:275
15: std::panic::catch_unwind
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\panic.rs:394
16: std::rt::lang_start_internal
at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54\/src\libstd\rt.rs:48
17: main
18: invoke_main
at d:\agent\_work\3\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:78
19: __scrt_common_main_seh
at d:\agent\_work\3\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288
20: BaseThreadInitThunk
21: RtlUserThreadStart
This is probably going to be controversial...
Calling end/pop in the Drop implementation causes way too many problems,
and interacts very badly with panics.
There are closure-based simpler implementations of almost everything
except parameter stacks that are still convenient to use. However, if we
end up switching to &mut Ui in most functions (very much possible in the
future!), closures will complicate matters so push/pop and begin/end
pairs are still relevant.
To avoid conflicts in dependency version, this commit put examples using
different renderers in different crates.
Especially, glium and gfx do not necessarily depend on the same version
of glutin.
We have two examples:
- imgui-examples (main examples, use gfx renderer here)
- imgui-glium-examples (basic hello_glium example + maybe some texture stuff)
Once vulcano support lands, we may add: imgui-vulkano-examples.
This commit currently only moves files around. We plan to use gfx as a
"main2 renderer for now on as gfx is more actively maintained that
glium. Subsequent commits will migrate some glium examples to gfx.
