Recover in GDScript

# This function triggers an error.
func may_error():
    assert(false, "a problem")

# The main function where we handle the error.
func _ready():
    # In GDScript, we use a try-catch block to handle errors.
    # This is similar to the defer and recover mechanism in other languages.
    try:
        may_error()
    except:
        # The error message can be accessed via the get_stack() function.
        var error_message = get_stack()[0]["source"]
        print("Recovered. Error:\n", error_message)
    
    # This code will run, unlike in some other languages where execution might stop.
    print("After may_error()")

# To run this script, attach it to a Node in your Godot scene.

In GDScript, error handling is done using a try-catch mechanism, which is different from some other languages that use defer and recover concepts. Here’s how it works:

1. We define a function may_error() that triggers an error using the assert() function. This is similar to panicking in other languages.

2. In the _ready() function (which is automatically called when the script is loaded), we use a try-catch block to handle potential errors.

3. We call the may_error() function inside the try block.

4. If an error occurs, it’s caught in the except block. We can access the error message using the get_stack() function, which provides information about the error.

5. We print the recovered error message.

6. Unlike in some other languages where execution might stop at the point of the error, in GDScript, the code after the try-catch block will still execute.

To run this script in Godot:

1. Create a new script in your Godot project.
2. Copy this code into the script.
3. Attach the script to a Node in your scene.
4. Run the scene.

You should see output similar to this in the Godot output panel:

Recovered. Error:
 a problem
After may_error()

This demonstrates how GDScript handles errors and allows for graceful recovery, enabling your game or application to continue running even when unexpected issues occur.