GD0303: Symbol parent of a type argument that must be Variant compatible was not handled
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                                      Value
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**Rule ID**                           GD0303
**Category**                          Usage
**Fix is breaking or non-breaking**   Not fixable
**Enabled by default**                Yes
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Cause
-----

This is a bug in the engine and must be reported.

Rule description
----------------

The ``MustBeVariantAnalyzer`` has found an unhandled case in the user source
code. Please, open an `issue <https://github.com/godotengine/godot/issues>`_
and attach a minimal reproduction project so it can be fixed.


How to fix violations
---------------------

Violations of this rule can't be fixed.

When to suppress warnings
-------------------------

Suppressing a warning from this rule may result in unexpected errors, since the
case found by the analyzer may need to be handled by the user to prevent
types that are not Variant-compatible from reaching the engine. Attempting to
marshal incompatible types will result in runtime errors.