Problem:    Some tests fail.
Solution:   Adjust tests for different assert_fails() behavior.  Remove unused
            variable.

Problem:    Cannot save and restore a register properly.
Solution:   Add getreginfo() and make setreg() accept a dictionary. (Andy
            Massimino, closes #3370)

Problem:    Cannot use octal numbers in scriptversion 4.
Solution:   Add the "0o" notation. (Ken Takata, closes #5304)

Problem:    Eval test is still old style.
Solution:   Change into new style tests. (Yegappan Lakshmanan, closes #6009)

Problem:    Crash with null partial and blob.
Solution:   Check for NULL pointer.  Add more tests. (Yegappan Lakshmanan,
            closes #5984)

Problem:    Crash when using null partial in filter().
Solution:   Fix crash.  Add more tests. (Yegappan Lakshmanan, closes #5976)

Problem:    Some tests are still old style.
Solution:   Convert to new style tests. (Yegappan Lakshmanan, closes #5957)

Problem:    Test_eval_stuff fails in normal terminal.
Solution:   Close the new window.

Problem:    Test_eval is old style.
Solution:   Change some tests to a new style test.

Problem:    Code in eval.c not sufficiently covered by tests.
Solution:   Add more tests. (Yegappan Lakshmanan, closes #5815)

Problem:    Mixing up "long long" and __int64 may cause problems. (John
            Marriott)
Solution:   Pass varnumber_T to vim_snprintf().  Add v:numbersize.

Problem:    Using channel or job with ":execute" has strange effects.
Solution:   Give an error message for Job and Channel.

Problem:    Not sufficient testing for quoted numbers.
Solution:   Add a few more test cases.

Problem:    has('vimscript-4') is always 0.
Solution:   Add "vimscript-4" to the feature table. (Naruhiko Nishino,
            closes #4941)

Problem:    Recognizing octal numbers is confusing.
Solution:   Introduce scriptversion 4: do not use octal and allow for single
            quote inside numbers.

Problem:    More functions can be used as methods.
Solution:   Make various functions usable as a method.

Problem:    Error when scriptversion is 2 a making a dictionary access.
Solution:   Parse the subscript even when not evaluating the sub-expression.
            (closes #4704)

Problem:    No numerical value for the patchlevel.
Solution:   Add v:versionlong.

Problem:    When skipping over code after an exception was thrown expression
            evaluation is aborted after a function call. (Ingo Karkat)
Solution:   Do not fail if not executing the expression. (closes #4507)

Problem:    has('vimscript-3') does not work.
Solution:   Add "vimscript-3" to the list of features.

Problem:    Not all Vim variables require the v: prefix.
Solution:   When scriptversion is 3 all Vim variables can only be used with
            the v: prefix.  (Ken Takata, closes #4274)

Problem:    Cannot enforce a Vim script style.
Solution:   Add the :scriptversion command. (closes #3857)

Problem:    Confusing overloaded operator "." for string concatenation.
Solution:   Add ".." for string concatenation.  Also "let a ..= b".

Problem:    Crash when setting v:errmsg to empty list. (Jaon Franklin)
Solution:   Separate getting value and assigning result.

Problem:    Not all Blob operations are tested.
Solution:   Add more testing for Blob.

Problem:    Code for Blob not sufficiently tested.
Solution:   Add more tests.  Fix uncovered crash.  Add test_null_blob().

Problem:    Setting v:errors to wrong type still possible.
Solution:   Return after giving an error message. (Christian Brabandt)

Problem:    Continuation lines cannot contain comments.
Solution:   Support using "\ .

Problem:    Mkdir with 'p' flag fails on existing directory, which is
            different from the mkdir shell command.
Solution:   Don't fail if the directory already exists. (James McCoy,
            closes #2775)

Problem:    Error messages suppressed after ":silent! try". (Ben Reilly)
Solution:   Restore emsg_silent before executing :try. (closes #2531)

Problem:    Error in return not caught by try/catch.
Solution:   Call update_force_abort(). (Yasuhiro Matsomoto, closes #2483)