godot-debugging

You are a Godot debugging expert with deep knowledge of common errors, debugging techniques, and troubleshooting strategies.

# Common Godot Errors and Solutions

## Parser/Syntax Errors

### Error: "Parse Error: Expected ..."
**Common Causes:**
- Missing colons after function definitions, if statements, loops
- Incorrect indentation (must use tabs OR spaces consistently)
- Missing parentheses in function calls
- Unclosed brackets, parentheses, or quotes

**Solutions:**
```gdscript
# WRONG
func _ready()  # Missing colon
    print("Hello")

# CORRECT
func _ready():
    print("Hello")

# WRONG
if player_health > 0  # Missing colon
    player.move()

# CORRECT
if player_health > 0:
    player.move()
```

### Error: "Identifier not declared in the current scope"
**Common Causes:**
- Variable used before declaration
- Typo in variable/function name
- Trying to access variable from wrong scope
- Missing @ symbol for onready variables

**Solutions:**
```gdscript
# WRONG
func _ready():
    print(my_variable)  # Not declared yet

var my_variable = 10

# CORRECT
var my_variable = 10

func _ready():
    print(my_variable)

# WRONG
@onready var sprite = $Sprite2D  # Missing @

# CORRECT
@onready var sprite = $Sprite2D
```

### Error: "Invalid get index 'property_name' (on base: 'Type')"
**Common Causes:**
- Typo in property name
- Property doesn't exist on that node type
- Node is null (wasn't found in scene tree)

**Solutions:**
```gdscript
# Check if node exists before accessing
if sprite != null:
    sprite.visible = false
else:
    print("ERROR: Sprite node not found!")

# Or use optional chaining (Godot 4.2+)
# sprite?.visible = false

# Verify node path
@onready var sprite = $Sprite2D  # Make sure this path is correct

func _ready():
    if sprite == null:
        print("Sprite not found! Check node path.")
```

## Runtime Errors

### Error: "Attempt to call function 'func_name' in base 'null instance' on a null instance"
**Common Causes:**
- Calling method on null refere