// (36,24): error CS8164: Cannot return by reference a result of 'Test.Goo<char>(ref char)' because the argument passed to parameter 'arg' cannot be returned by reference
// (36,24): error CS8521: Cannot use a result of 'Test.Goo<char>(ref char)' in this context because it may expose variables referenced by parameter 'arg' outside of their declaration scope
// (41,24): error CS8164: Cannot return by reference a result of 'Test.Goo<char>(ref char)' because the argument passed to parameter 'arg' cannot be returned by reference
// (41,24): error CS8521: Cannot use a result of 'Test.Goo<char>(ref char)' in this context because it may expose variables referenced by parameter 'arg' outside of their declaration scope
// (46,24): error CS8522: Cannot use a member of result of 'Test.Foo<Test.S1>(ref Test.S1)' in this context because it may expose variables referenced by parameter 'arg' outside of their declaration scope
// (46,24): error CS8522: Cannot use a member of result of 'Test.Goo<Test.S1>(ref Test.S1)' in this context because it may expose variables referenced by parameter 'arg' outside of their declaration scope
// (8,20): error CS8910: Cannot return or assign a reference to the result of 'D.Invoke(ref int, ref int, object)' because the argument passed to parameter 'i' cannot be returned or assigned by reference
// (8,20): error CS8521: Cannot use a result of 'D.Invoke(ref int, ref int, object)' in this context because it may expose variables referenced by parameter 'i' outside of their declaration scope
// return ref d(ref i, ref j, o);
// return ref d(ref i, ref j, o);
Diagnostic(ErrorCode.ERR_RefReturnCall,"d(ref i, ref j, o)").WithArguments("D.Invoke(ref int, ref int, object)","i").WithLocation(8,20));
Diagnostic(ErrorCode.ERR_EscapeCall,"d(ref i, ref j, o)").WithArguments("D.Invoke(ref int, ref int, object)","i").WithLocation(8,20)
// (7,20): error CS8910: Cannot return or assign a reference to the result of 'Program.M(ref int)' because the argument passed to parameter 'i' cannot be returned or assigned by reference
// (7,20): error CS8521: Cannot use a result of 'Program.M(ref int)' in this context because it may expose variables referenced by parameter 'i' outside of their declaration scope