src/Sema.zig                                                                               | 66 ++++++++++++++++++++++++++------
 test/cases/compile_errors/any_typed_null_to_any_typed_optional.zig                         | 10 ++---
 test/cases/compile_errors/cast_between_optional_T_where_T_is_not_a_pointer.zig             | 16 ++++++++
 test/cases/compile_errors/implicit_cast_to_c_ptr_from_int.zig                              | 15 ++++++++
 test/cases/compile_errors/stage1/test/cast_between_optional_T_where_T_is_not_a_pointer.zig | 15 --------
 test/cases/compile_errors/type_mismatch_in_C_prototype_with_varargs.zig                    |  2 +-
 6 files changed, 92 insertions(+), 32 deletions(-)