Problem: When using a job in raw mode to append to a buffer garbage
characters are added.
Solution: Do not replace the trailing NUL with a NL. (Ozaki Kiichi)
Problem: Collapsing channel buffers and searching for NL does not work
properly. (Xavier de Gary, Ramel Eshed)
Solution: Do not assume the buffer contains a NUL or not. Change NUL bytes
to NL to avoid the string is truncated.
Problem: Whether a job has exited isn't detected until a character is
typed. After calling exit_cb the cursor is in the wrong place.
Solution: Don't wait forever for a character to be typed when there is a
pending job. Update the screen if neede after calling exit_cb.
Problem: When a channel writes to a buffer it doesn't find a buffer by the
short name but re-uses it anyway.
Solution: Find buffer also by the short name.
Problem: When a channel appends to a buffer that is 'nomodifiable' there is
an error but appending is done anyway.
Solution: Add the 'modifiable' option. Refuse to write to a 'nomodifiable'
when the value is 1.
Problem: Crash when job and channel are in the same dict while using
partials. (Luc Hermitte)
Solution: Do not decrement the channel reference count too early.
Problem: Callbacks are invoked when it's not safe. (Andrew Stewart)
Solution: When a channel is to be closed don't invoke callbacks right away,
wait for a safe moment.
Problem: When a job is no longer referenced and does not have an exit
callback the process may hang around in defunc state. (Nicola)
Solution: Call job_status() if the job is running and won't get freed
because it might still be useful.
Problem: A channel may be garbage collected while it's still being used by
a job. (James McCoy)
Solution: Mark the channel as used if the job is still used. Do the same
for channels that are still used.
Problem: Cannot use ch_read() in the close callback.
Solution: Do not discard the channel if there is readahead. Do not discard
readahead if there is a close callback.
Problem: When a job ends the close callback is invoked before other
callbacks. On Windows the close callback is not called.
Solution: First invoke out/err callbacks before the close callback.
Make the close callback work on Windows.
Problem: When a buffer gets updated while in command line mode, the screen
may be messed up.
Solution: Postpone the redraw when the screen is scrolled.
Problem: Cannot detect a crash in tests when caused by garbagecollect().
Solution: Add garbagecollect_for_testing(). Do not free a job if is still
useful.
Problem: Leaking memory when there is a cycle involving a job and a
partial.
Solution: Add a copyID to job and channel. Set references in items referred
by them. Go through all jobs and channels to find unreferenced
items. Also, decrement reference counts when garbage collecting.
Problem: No test for an invalid Ex command on a channel.
Solution: Test handling an invalid command gracefully. Avoid getting an
error message, do write it to the channel log.
