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GDScript compiler: check if subclass exists before comparison
Otherwise these checks might trigger the insertion of an empty value, leading to crashes.
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@ -486,7 +486,7 @@ int GDScriptCompiler::_parse_expression(CodeGen &codegen, const GDScriptParser::
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script = codegen.script;
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} else {
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StringName name = cn->cast_type.class_type->name;
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if (class_map[name] == codegen.script->subclasses[name]) {
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if (codegen.script->subclasses.has(name) && class_map[name] == codegen.script->subclasses[name]) {
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idx = codegen.get_name_map_pos(name);
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idx |= GDScriptFunction::ADDR_TYPE_CLASS_CONSTANT << GDScriptFunction::ADDR_BITS;
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} else {
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@ -1183,7 +1183,7 @@ int GDScriptCompiler::_parse_expression(CodeGen &codegen, const GDScriptParser::
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script = codegen.script;
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} else {
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StringName name = assign_type.class_type->name;
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if (class_map[name] == codegen.script->subclasses[name]) {
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if (codegen.script->subclasses.has(name) && class_map[name] == codegen.script->subclasses[name]) {
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idx = codegen.get_name_map_pos(name);
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idx |= GDScriptFunction::ADDR_TYPE_CLASS_CONSTANT << GDScriptFunction::ADDR_BITS;
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} else {
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