Problem: Text found after :endfunction is silently ignored.
Solution: Give a warning if 'verbose' is set. When | or \n are used,
execute the text as a command.
Problem: Saving the redo buffer only works one time, resulting in the "."
command not working well for a function call inside another
function call. (Ingo Karkat)
Solution: Save the redo buffer at every user function call. (closes#1619)
Problem: Cannot access the arguments of the current function in debug mode.
(Luc Hermitte)
Solution: use get_funccal(). (Lemonboy, closes#1432, closes#1352)
Problem: It is not so easy to write a script that works with both Python 2
and Python 3, even when the Python code works with both.
Solution: Add 'pyxversion', :pyx, etc. (Marc Weber, Ken Takata)
Problem: Cannot make Vim fail on an internal error.
Solution: Add IEMSG() and IEMSG2(). (Domenique Pelle) Avoid reporting an
internal error without mentioning where.
Problem: A funccal is garbage collected while it can still be used.
Solution: Set copyID in all referenced functions. Do not list lambda
functions with ":function".
Problem: Leaking memory when redefining a function.
Solution: Don't increment the function reference count when it's found by
name. Don't remove the wrong function from the hashtab. More
reference counting fixes.
Problem: Using function() with a name will find another function when it is
redefined.
Solution: Add funcref(). Refer to lambda using a partial. Fix several
reference counting issues.
Problem: User defined functions can't be a closure.
Solution: Add the "closure" argument. Allow using :unlet on a bound
variable. (Yasuhiro Matsumoto, Ken Takata)
Problem: Using submatch() in a lambda passed to substitute() is verbose.
Solution: Use a static list and pass it as an optional argument to the
function. Fix memory leak.
Problem: Coverity complains about not restoring a value.
Solution: Restore the value, although it's not really needed. Change return
to jump to cleanup, might leak memory.
