CFE currently allows covariant on extension method parameters. The following tests are failing due to this:
co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/01
co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/02
co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/03
co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/04
co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/05
co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/06
CFE currently allows
covarianton extension method parameters. The following tests are failing due to this:co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/01co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/02co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/03co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/04co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/05co19_2/LanguageFeatures/Extension-methods/syntax_covariant_t01/06