Problem:    Python: popitem() was not defined in a standard way.
Solution:   Remove the argument from popitem(). (ZyX)

Problem:    Compiler warnings for shadowed variables. (Christian Brabandt)
Solution:   Rename new_state() to alloc_state().  Remove unnecessary
            declaration.

Problem:    New regexp engine: Attempts to match "^" at every character.
Solution:   Only try "^" at the start of a line.

Problem:    New regexp engine: When a sub expression is empty \1 skips a
            character.
Solution:   Make \1 try the current position when the match is emtpy.

Problem:    Can't build with regexp debugging.  NFA debug output shows wrong
            pattern.
Solution:   Fix debugging code for recent changes.  Add the pattern to the
            program.

Problem:    New regexp engine: no error when using \z1 or \z( where it does
            not work.
Solution:   Give an error message.

Problem:    New regexp engine does not support \z1 .. \z9 and \z(.
Solution:   Implement the syntax submatches.

Problem:    Tests 86 and 87 fail on MS-Windows. (Ken Takata)
Solution:   Fix platform-specific stuff. (ZyX)

Problem:    New regexp engine: \@<= and \@<! are not implemented.
Solution:   Implement look-behind matching.  Fix off-by-one error in old
            regexp engine.

Problem:    A leading star is not seen as a normal char when \{} follows.
Solution:   Save and restore the parse state properly.

Problem:    Old regexp engine accepts illegal range, new one doesn't.
Solution:   Also accept the illegal range with the new engine.

Problem:    New regexp engine: Non-greedy multi doesn't work.
Solution:   Implement \{-}.

Problem:    New regexp engine: only accepts up to \{,10}.
Solution:   Remove upper limit.  Remove dead code with NFA_PLUS.

Problem:    New regexp engine: Does not support \%^ and \%$.
Solution:   Support matching start and end of file.

Problem:    New regexp engine: Problem with \@= matching.
Solution:   Save and restore nfa_match.

Problem:    Compiler warnings on 64-bit Windows.
Solution:   Change variable types. (Mike Williams)

Problem:    Test 86 fails.
Solution:   Comment out the parts that don't work.  Make it pass on 32 bit
            systems.

Problem:    Test 87 fails.
Solution:   Fix the test for Python 3.3. (ZyX)  Make it pass on 32 bit systems.

Problem:    New regexp engine: \@! doesn't work.
Solution:   Implement the negated version of \@=.

Problem:    Python: Allocating dict the wrong way, causing a crash.
Solution:   Use py_dict_alloc(). Fix some exception problems. (ZyX)

Problem:    New regexp engine: \@= and \& don't work.
Solution:   Make these items work.  Add column info to logging.

Problem:    Compiler warning for storing a long_u in an int.
Solution:   Declare the number as an int. (Mike Williams)

Problem:    Compiler warning for printf format. (Manuel Ortega)
Solution:   Add type casts.

Problem:    New regexp engine may run out of states.
Solution:   Allocate states dynamically.  Also make the test report errors.

Problem:    Compiler warning for unitialized variable.
Solution:   Initialize it.

Problem:    New regexp engine: backreferences don't work correctly.
Solution:   Add every possible start/end position on the state stack.

Problem:    Vim crashes in Python tests. Compiler warning for unused function.
Solution:   Disable the tests for now. Move the function.

Problem:    Python: memory leaks.
Solution:   Python patch 28: Purge out DICTKEY_CHECK_EMPTY macros. (ZyX)

Problem:    Python: Script is auto-loaded on function creation.
Solution:   Python patch 27. (ZyX)

Problem:    Python: documentation lags behind.
Solution:   Python patch 26. (ZyX)

Problem:    Python: Insufficient exception and error testing.
Solution:   Python patch 25. (ZyX)

Problem:    Python: key mapping is not standard.
Solution:   Puthon patch 24: use PyMapping_Keys. (ZyX)

Problem:    Python: insufficient error checking.
Solution:   Python patch 23. (ZyX)

Problem:    Python: Function is not standard.
Solution:   Python patch 22: make Function subclassable. (ZyX)

Problem:    Python: List is not standard.
Solution:   Python patch 21: Add standard methods and fields. (ZyX)

Problem:    Python: Dictionary is not standard.
Solution:   Python patch 20: Add standard methods and fields. (ZyX)

Problem:    Python: can't repr() a function.
Solution:   Python patch 19: add FunctionRepr(). (ZyX)

Problem:    Python: Using fixed size buffers.
Solution:   Python patch 18: Use python's own formatter. (ZyX)

Problem:    Call of funcref does not succeed in other script.
Solution:   Python patch 17: add get_expanded_name(). (ZyX)