Panic in init function does not catch unwind and crashes editor

[TrevorCow]

Running the following project in Godot version Godot Engine v4.3.stable.official.77dcf97d8 will immediately crash the editor on project load, as loading the project calls all the init functions.

lib.rs

use godot::classes::{INode2D, Node2D};
use godot::global::godot_print;
use godot::init::{gdextension, ExtensionLibrary};
use godot::obj::Base;
use godot::register::{godot_api, GodotClass};

struct MyExtension {}

#[gdextension]
unsafe impl ExtensionLibrary for MyExtension {}

#[derive(GodotClass)]
#[class(base=Node2D)]
struct TestObject {
    base: Base<Node2D>,
}

#[godot_api]
impl INode2D for TestObject {
    fn init(_base: Base<Self::Base>) -> Self {
        godot_print!("Hello, world!");
        panic!("Something went wrong with init!")
    }
}

Cargo.toml

[package]
name = "test_godot_rust"
version = "0.1.0"
edition = "2021"

[lib]
crate-type = ["cdylib"]  # Compile this crate to a dynamic C library.

[dependencies]
godot = { git = "https://github.com/godot-rust/gdext", branch = "master" }

Full console output and stack trace

> Godot_v4.3-stable_win64_console.exe
Godot Engine v4.3.stable.official.77dcf97d8 - https://godotengine.org
OpenGL API 3.3.0 NVIDIA 565.90 - Compatibility - Using Device: NVIDIA - NVIDIA GeForce RTX 3080 Ti

Editing project: C:/Dev/godot/test_project
WARNING: The original path size of 'test_godot_rust.pdb' in bytes was too small to fit the new name, so it was shortened to '~test_godot_rust_999.pdb'.
     at: copy_and_rename_pdb (platform/windows/windows_utils.cpp:182)
Initialize godot-rust (API v4.3.stable.official, runtime v4.3.stable.official)
Godot Engine v4.3.stable.official.77dcf97d8 - https://godotengine.org
OpenGL API 3.3.0 NVIDIA 565.90 - Compatibility - Using Device: NVIDIA - NVIDIA GeForce RTX 3080 Ti

Hello, world!
thread '<unnamed>' panicked at src\lib.rs:22:9:
Something went wrong with init!
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread '<unnamed>' panicked at library\core\src\panicking.rs:221:5:
panic in a function that cannot unwind
stack backtrace:
   0:     0x7ff994c4664d - std::backtrace_rs::backtrace::dbghelp64::trace
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\..\..\backtrace\src\backtrace\dbghelp64.rs:91
   1:     0x7ff994c4664d - std::backtrace_rs::backtrace::trace_unsynchronized
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\..\..\backtrace\src\backtrace\mod.rs:66
   2:     0x7ff994c4664d - std::sys::backtrace::_print_fmt
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\sys\backtrace.rs:65
   3:     0x7ff994c4664d - std::sys::backtrace::impl$0::print::impl$0::fmt
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\sys\backtrace.rs:40
   4:     0x7ff994c58719 - core::fmt::rt::Argument::fmt
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\core\src\fmt\rt.rs:173
   5:     0x7ff994c58719 - core::fmt::write
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\core\src\fmt\mod.rs:1182
   6:     0x7ff994c44af1 - std::io::Write::write_fmt<std::sys::pal::windows::stdio::Stderr>
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\io\mod.rs:1827
   7:     0x7ff994c48357 - std::panicking::default_hook::closure$1
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\panicking.rs:269
   8:     0x7ff994c47f49 - std::panicking::default_hook
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\panicking.rs:296
   9:     0x7ff994c48a3b - alloc::boxed::impl$50::call
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\alloc\src\boxed.rs:2084
  10:     0x7ff994c48a3b - std::panicking::rust_panic_with_hook
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\panicking.rs:808
  11:     0x7ff994c4889f - std::panicking::begin_panic_handler::closure$0
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\panicking.rs:667
  12:     0x7ff994c46d3f - std::sys::backtrace::__rust_end_short_backtrace<std::panicking::begin_panic_handler::closure_env$0,never$>
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\sys\backtrace.rs:168
  13:     0x7ff994c484b6 - std::panicking::begin_panic_handler
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\std\src\panicking.rs:665
  14:     0x7ff994c5ecfd - core::panicking::panic_nounwind_fmt::runtime
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\core\src\panicking.rs:112
  15:     0x7ff994c5ecfd - core::panicking::panic_nounwind_fmt
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\core\src\panicking.rs:122
  16:     0x7ff994c5eda3 - core::panicking::panic_nounwind
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\core\src\panicking.rs:221
  17:     0x7ff994c5ef5b - core::panicking::panic_cannot_unwind
                               at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library\core\src\panicking.rs:309
  18:     0x7ff994a36363 - godot_core::registry::callbacks::create<ship_fight_rust::TestObject>
                               at C:\Users\trevo\.cargo\git\checkouts\gdext-76630c89719e160c\a0d5799\godot-core\src\registry\callbacks.rs:22
  19:     0x7ffa064ef540 - _CxxFrameHandler3
  20:     0x7ffa064e33d8 - is_exception_typeof
  21:     0x7ffa180549c6 - RtlCaptureContext2
  22:     0x7ff994a3633b - godot_core::registry::callbacks::create<test_godot_rust::TestObject>
                               at C:\Users\trevo\.cargo\git\checkouts\gdext-76630c89719e160c\a0d5799\godot-core\src\registry\callbacks.rs:25
  23:     0x7ff7bf6ee44d - <unknown>
  24:     0x7ff7bc058dce - <unknown>
  25:     0x7ff7bc0a86a9 - <unknown>
  26:     0x7ff7bc0d6f99 - <unknown>
  27:     0x7ff7bfc4ffe5 - <unknown>
  28:     0x7ff7bf6da3c1 - <unknown>
  29:     0x7ff7bd3e4740 - <unknown>
  30:     0x7ff7bb028de2 - <unknown>
  31:     0x7ff7bb06557c - <unknown>
  32:     0x7ff7c078c493 - <unknown>
  33:     0x7ff7bafc12ee - <unknown>
  34:     0x7ff7bafc13e6 - <unknown>
  35:     0x7ffa168c257d - BaseThreadInitThunk
  36:     0x7ffa1800af08 - RtlUserThreadStart
thread caused non-unwinding panic. aborting.