Problem:    Patch 7.3.1058 breaks backwards compatibility, not possible to use
            a function reference as a string. (lilydjwg)
Solution:   Instead of translating the function name only translate "s:".

Problem:    New regexp engine: some work is done while executing a pattern,
            even though the result is predictable.
Solution:   Do the work while compiling the pattern.

Problem:    Python "sane" configure checks give a warning message.
Solution:   Use single quotes intead of escaped double quotes. (Ben Fritz)

Problem:    Python configure check doesn't reject Python 2 when requesting
            Python 3.  Some systems need -pthreads instead of -pthread.
Solution:   Adjust configure accordingly. (Andrei Olsen)

Problem:    Loading Python modules is not tested.
Solution:   Enable commented-out tests, add missing files. (ZyX)

Problem:    HP-UX compiler can't handle zero size array. (Charles Cooper)
Solution:   Make the array one item big.

Problem:    Can't test what is actually displayed on screen.
Solution:   Add the screenchar() and screenattr() functions.

Problem:    Not easy to load Python modules.
Solution:   Search "python2", "python3" and "pythonx" directories in
            'runtimepath' for Python modules. (ZyX)

Problem:    Python: Memory leaks
Solution:   Add more Py_DECREF(). (ZyX)

Problem:    Python: PyList_SetItem() is inefficient.
Solution:   Use PyList_SET_ITEM() (ZyX)

Problem:    Mixing long and pointer doesn't always work.
Solution:   Avoid cast to pointer.

Problem:    The round() function is not always available. (Christ van
            Willegen)
Solution:   Use the solution from f_round().

Problem:    Crash when running test 86. (Jun Takimoto)
Solution:   Define PY_SSIZE_T_CLEAN early. (Elimar Riesebieter)

Problem:    New regexp engine fails on "\(\<command\)\@<=.*"
Solution:   Fix rule for postponing match.  Further tune estimating whether
            postponing works better.  Add test.

Problem:    Compiler warnings. (dv1445)
Solution:   Initialize variables, even when the value isn't really used.

Problem:    MS-DOS: "make test" uses external rmdir command.
Solution:   Rename "rmdir" to "rd". (Taro Muraoka)

Problem:    New regexp_nfa engine: Uneccessary code.
Solution:   Remove uneccessary code.

Problem:    New regexp engine: Some look-behind matches are very expensive.
Solution:   Pospone invisible matches further, until a match is almost found.

Problem:    In tiny build ireg_icombine is undefined. (Tony Mechelynck)
Solution:   Add #ifdef.

Problem:    New regexp engine: Slow when a look-behind match is followed by a
            zero-width match.
Solution:   Postpone the look-behind match more often.

Problem:    New regexpengine: Slow when a look-behind match does not have a
            width specified.
Solution:   Try to compute the maximum width.

Problem:    New regexp engine: Matching plain text could be faster.
Solution:   Detect a plain text match and handle it specifically.  Add
            vim_regfree().

Problem:    No command line completion for ":syntime".
Solution:   Implement the completion. (Dominique Pelle)

Problem:    New regexp engine: regstart is only used to find the first match.
Solution:   Use regstart whenever adding the start state.

Problem:    New regexp engine: look-behind match not checked when followed by
            zero-width match.
Solution:   Do the look-behind match before adding the zero-width state.

Problem:    New regexp engine: addstate() is called very often.
Solution:   Optimize adding the start state.

Problem:    "RO" is not translated everywhere.
Solution:   Put inside _(). (Sergey Alyoshin)

Problem:    When mapping NUL it is displayed as an X.
Solution:   Check for KS_ZERO instead of K_ZERO. (Yasuhiro Matsumoto)

Problem:    Memory leak in ":syntime report".
Solution:   Clear the grow array. (Dominique Pelle)

Problem:    Win32: Check for available memory is not reliable and adds
            overhead.
Solution:   Remove mch_avail_mem(). (Mike Williams)

Problem:    New regexp engine: trying expensive match while the result is not
            going to be used.
Solution:   Check for output state already being in the state list.

Problem:    New regexp engine: negated flag is hardly used.
Solution:   Add separate _NEG states, remove negated flag.

Problem:    New regexp engine: neglist no longer used.
Solution:   Remove the now unused neglist.

Problem:    New regexp engine: collections are slow.
Solution:   Handle all characters in one go.

Problem:    ":func Foo" does not show attributes.
Solution:   Add "abort", "dict" and "range". (Yasuhiro Matsumoto)

Problem:    Compiler warning for unused argument.
Solution:   Add UNUSED.

Problem:    Running test 49 takes a long time.
Solution:   Don't have it grep all files.

Problem:    New regexp engine is a bit slow.
Solution:   Skip ahead to a character that must match.  Don't try matching a
            "^" patter past the start of line.

Problem:    Crash when debugging regexp.
Solution:   Do not try to dump subexpr that were not set.  Skip over count of
            \% items.