- Make sure that proc->in is not NULL, because nvim crashed when
starting a job with pty.
- Make sure that proc->out is not NULL, because nvim crashed when stopping
a job opened with pty.
Handling of process exit is still broken. It detects the moment when the
child process exits, then quickly stops polling for process output. It
should continue polling for output until the agent has scraped all of the
process' output. This problem is easy to notice by running a command like
"dir && exit", but even typing "exit<ENTER>" can manifest the problem --
the "t" might not appear.
winpty's Cygwin adapter handles shutdown by waiting for the agent to close
the CONOUT pipe, which it does after it has scraped the child's last
output. AFAIK, neovim doesn't do anything interesting when winpty closes
the CONOUT pipe.
Closes#7086
Problem: Storing a zero byte from a multi-byte character causes fold text
to show up wrong.
Solution: Avoid putting zero in ScreenLines. (Christian Brabandt,
closesvim/vim#1567)
c6cd8409c2
vim-patch:8.0.0290: cursor positioning wrong if wide character wraps
Problem: If a wide character doesn't fit at the end of the screen line, and
the line doesn't fit on the screen, then the cursor position may
be wrong. (anliting)
Solution: Don't skip over wide character. (Christian Brabandt, closes vim/1408)
vim-patch:8.0.0394
Problem: Tabs are not aligned when scrolling horizontally and a Tab doesn't
fit. (Axel Bender)
Solution: Handle a Tab as a not fitting character. (Christian Brabandt)
Also fix that ":redraw" does not scroll horizontally to show the
cursor. And fix the test that depended on the old behavior.
abc39ab642
Problem: Linebreak tests are old style.
Solution: Turn the tests into new style. Share utility functions. (Ozaki
Kiichi, closesvim/vim#1444)
544d3bc9f0
Problem: Display problem with 'foldcolumn' and a wide character.
(esiegerman)
Solution: Don't use "extra" but an allocated buffer. (Christian Brabandt,
closesvim/vim#1310)
6270660611
32396b5879 add length checks to
TERMINAL_FAMILY/STARTS_WITH to ensure memcmp() wouldn't read past the
end of the string. However, "term" was copy/pasted from TERMINAL_FAMILY
so STARTS_WITH() was unnecessarily reading the, potentially NULL, term
variable.
Closes#4370
Explication:
In the backtrace in #4370, we see that `buf_write()` was called with
non-NULL `fname` and `sfname` arguments, but they've since _become_
NULL.
#7 0x00000000004de09d in buf_write (buf=0x1dee040, fname=0x0, fname@entry=0x1e985b0 "/home/sean/src/github.com/snczl/virta/pkg/meld/segment.go",
sfname=0x0, sfname@entry=0x1ddfa60 "segment.go", start=1, end=72, eap=eap@entry=0x7ffc6b032e60, append=0,
forceit=0, reset_changed=1, filtering=0)
at /home/travis/build/neovim/bot-ci/build/neovim/src/nvim/fileio.c:2576
This is most likely due to the code that restores those values from
`buf`, which happens just before the fatal call to `os_fileinfo`
```c
/*
* The autocommands may have changed the name of the buffer, which may
* be kept in fname, ffname and sfname.
*/
if (buf_ffname)
ffname = buf->b_ffname;
if (buf_sfname)
sfname = buf->b_sfname;
if (buf_fname_f)
fname = buf->b_ffname;
if (buf_fname_s)
fname = buf->b_sfname;
```
It's worth noting that at this point `ffname` is still non-NULL, so
it _could_ be used. However, our current code is purely more strict
than Vim in this area, which has caused us problems before (e.g.,
`getdigits()`). The commentary for `struct file_buffer` clearly
indicate that all of `b_ffname`, `b_sfname`, and `b_fname` may be
NULL:
```c
/*
* b_ffname has the full path of the file (NULL for no name).
* b_sfname is the name as the user typed it (or NULL).
* b_fname is the same as b_sfname, unless ":cd" has been done,
* then it is the same as b_ffname (NULL for no name).
*/
char_u *b_ffname; /* full path file name */
char_u *b_sfname; /* short file name */
char_u *b_fname; /* current file name */
```
Vim directly calls `stat(2)` which, although it is annotated to tell
the compiler that the path argument is non-NULL, does handle a NULL
pointer by returning a `-1` value and setting `errno` to `EFAULT`.
This satisfies Vim's check, since it treats any `-1` return from
`stat(2)` to mean the file doesn't exist (at least in this code
path).
Note that Vim's mch_stat() implementations on win32 and solaris
clearly cannot accept NULL `name`. But the codepaths that call
mch_stat will NULL `name` tend to be unix-only (eg: u_read_undo)!
