tests/cases/compiler/inheritFromGenericTypeParameter.ts(1,20): error TS2311: A class may only extend another class. tests/cases/compiler/inheritFromGenericTypeParameter.ts(2,24): error TS2312: An interface may only extend a class or another interface. ==== tests/cases/compiler/inheritFromGenericTypeParameter.ts (2 errors) ==== class C extends T { } ~ !!! error TS2311: A class may only extend another class. interface I extends T { } ~ !!! error TS2312: An interface may only extend a class or another interface.