Log Message:
Updated py-cffi to 1.9.1.

v1.9

    Structs with variable-sized arrays as their last field: now we
    track the length of the array after ffi.new() is called, just
    like we always tracked the length of ffi.new("int[]", 42). This
    lets us detect out-of-range accesses to array items. This also
    lets us display a better repr(), and have the total size returned
    by ffi.sizeof() and ffi.buffer(). Previously both functions
    would return a result based on the size of the declared structure
    type, with an assumed empty array. (Thanks andrew for starting
    this refactoring.)
    Add support in cdef()/set_source() for unspecified-length arrays
    in typedefs: typedef int foo_t[...];. It was already supported
    for global variables or structure fields.
    I turned in v1.8 a warning from cffi/model.py into an error:
    'enum xxx' has no values explicitly defined: refusing to guess
    which integer type it is meant to be (unsigned/signed, int/long).
    Now Iâm turning it back to a warning again; it seems that
    guessing that the enum has size int is a 99%-safe bet. (But
    not 100%, so it stays as a warning.)
    Fix leaks in the code handling FILE * arguments. In CPython 3
    there is a remaining issue that is hard to fix: if you pass a
    Python file object to a FILE * argument, then os.dup() is used
    and the new file descriptor is only closed when the GC reclaims
    the Python file objectâand not at the earlier time when you
    call close(), which only closes the original file descriptor.
    If this is an issue, you should avoid this automatic convertion
    of Python file objects: instead, explicitly manipulate file
    descriptors and call fdopen() from C (...via cffi).