Tested versions

• Reproducible in: v4.3.dev.custom_build [9d6bdbc]
• Not Reproducible in: 4.2.1 Stable

System information

Godot v4.3.dev (9d6bdbc) - Windows 10.0.22621 - GLES3 (Compatibility) - NVIDIA GeForce RTX 3080 Ti (NVIDIA; 31.0.15.5186) - AMD Ryzen 9 5900X 12-Core Processor (24 Threads)

Issue description

Upon running the Physics-Based Platformer 2D Demo project Godot throws this error every time:

ERROR: Signal 'tree_exiting' is already connected to given callable 'Joint2D::_body_exit_tree' in that object.
   at: (core\object\object.cpp:1413)
ERROR: Signal 'tree_exiting' is already connected to given callable 'Joint2D::_body_exit_tree' in that object.
   at: (core\object\object.cpp:1413)
ERROR: Signal 'tree_exiting' is already connected to given callable 'Joint2D::_body_exit_tree' in that object.
   at: (core\object\object.cpp:1413)
ERROR: Signal 'tree_exiting' is already connected to given callable 'Joint2D::_body_exit_tree' in that object.
   at: (core\object\object.cpp:1413)

This error does not appear with 4.2.1 Stable version.

Steps to reproduce

Run the Physics-Based Platformer 2D Demo project and view the Output or console log.

Minimal reproduction project (MRP)

Use the Physics-Based Platformer 2D Demo project.

Bisect Results

63bff87 is the first bad commit
commit 63bff87
Author: @KoBeWi
Date: Sun Apr 7 12:21:40 2024 +0200

Fix PinJoint2D deferred call error

scene/2d/physics/joints/joint_2d.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

That is #90340

That PR was a fix for Issue #90107 so it seems perhaps one error was traded for another?

Or possibly the Demo itself has a problem, but again this error does not occur with 4.2.1 Stable, so if it is an error it is due to a change in 4.3 that is either breaking or bringing an old problem to light.