Does not actually matter for most uses, but critical for mark&sweep garbage
collector.
Closes#5234Closes#5774Closes#5817Closes#5883Closes#5934Closes#5970Closes#5548
Helped-by: James McCoy <jamessan@jamessan.com>
Helped-by: Tommy Allen <tommy@esdf.io>
Helped-by: Justin M. Keyes <justinkz@gmail.com>
---
Steps to reproduce:
Compile fb9745785226c3251d4c40e84abe7d031183929a with:
CC=clang CFLAGS=" -O0 -g -DEXITFREE " cmake .. -DMIN_LOG_LEVEL=0 -DCMAKE_BUILD_TYPE=Debug -DBUSTED_OUTPUT_TYPE=utf
-DCMAKE_INSTALL_PREFIX=$PWD/root -DJEMALLOC_USE_BUNDLED=1 -DCLANG_ASAN_UBSAN=ON -DPREFER_LUAJIT=false
Directory `crash` contains:
1. unite directory with be09b0e578
2. vimfiler directory with 72c37e897d
3. `init.vim` with a single line which sets `&rtp` to the above two directories (absolute path).
bin/nvim -u ../crash/init.vim -i NONE --headless -s <(<<< $':split\n:VimFiler\n\C-ww:call garbagecollect()\n\C-w\C-w\C-w')
---
Sample backtrace showing dv_copyID being overwritten by clear_tv, which
allows it to be collected by garbage_collect .. free_unref_items:
Old value = 152911
New value = 152912
0x00000000004938e5 in encode_vim_to_nothing (ignored=0x7fb6348f3b20, top_tv=0x7fb6348f3b20, objname=0x6d62e9 "clear_tv argument") at ../src/nvim/eval/typval_encode.c.h:641
641 cur_mpsv->data.d.dict->dv_copyID = copyID - 1;
(rr) bt
#0 0x00000000004938e5 in encode_vim_to_nothing (ignored=0x7fb6348f3b20, top_tv=0x7fb6348f3b20, objname=0x6d62e9 "clear_tv argument") at ../src/nvim/eval/typval_encode.c.h:641
#1 0x0000000000485dee in clear_tv (varp=0x7fb6348f3b20) at /home/foo/src/github.com/neovim/src/nvim/eval.c:19876
#2 0x0000000000494e5e in vars_clear_ext (ht=0x7fb634351460, free_val=1) at /home/foo/src/github.com/neovim/src/nvim/eval.c:20378
#3 0x0000000000494dca in vars_clear (ht=0x7fb634351460) at /home/foo/src/github.com/neovim/src/nvim/eval.c:20355
#4 0x000000000048efa3 in free_funccal (fc=0x7fb634351200, free_val=0) at /home/foo/src/github.com/neovim/src/nvim/eval.c:22927
#5 0x0000000000491d8f in call_user_func (fp=0x7fb6340ae4e0, argcount=0, argvars=0x7ffdd216a050, rettv=0x7ffdd216a2b0, firstline=2, lastline=2, selfdict=0x0)
at /home/foo/src/github.com/neovim/src/nvim/eval.c:22818
#6 0x00000000004873a4 in call_func (funcname=0x7fb6348ba3e0 "vimfiler#view#_redraw_screen", len=28, rettv=0x7ffdd216a2b0, argcount_in=0, argvars_in=0x7ffdd216a050, argv_func=0x0, firstline=2,
lastline=2, doesrange=0x7ffdd216a2ac, evaluate=true, partial=0x0, selfdict_in=0x0) at /home/foo/src/github.com/neovim/src/nvim/eval.c:7687
#7 0x000000000048a6f0 in get_func_tv (name=0x7fb6348ba3e0 "vimfiler#view#_redraw_screen", len=28, rettv=0x7ffdd216a2b0, arg=0x7ffdd216a2c8, firstline=2, lastline=2, doesrange=0x7ffdd216a2ac,
evaluate=1, partial=0x0, selfdict=0x0) at /home/foo/src/github.com/neovim/src/nvim/eval.c:7459
#8 0x0000000000489691 in ex_call (eap=0x7ffdd216a598) at /home/foo/src/github.com/neovim/src/nvim/eval.c:2817
#9 0x00000000004fae46 in do_one_cmd (cmdlinep=0x7ffdd216a878, flags=7, cstack=0x7ffdd216a880, fgetline=0x4f7c30 <get_loop_line>, cookie=0x7ffdd216a7f8)
at /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:2198
#10 0x00000000004f6ae3 in do_cmdline (cmdline=0x0, fgetline=0x499f50 <get_func_line>, cookie=0x7fb634350800, flags=7) at /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:601
#11 0x00000000004918c0 in call_user_func (fp=0x7fb6340ae6a0, argcount=0, argvars=0x7ffdd216b6d0, rettv=0x7ffdd216b930, firstline=2, lastline=2, selfdict=0x0)
at /home/foo/src/github.com/neovim/src/nvim/eval.c:22728
#12 0x00000000004873a4 in call_func (funcname=0x7fb6348f3ee0 "vimfiler#view#_redraw_all_vimfiler", len=34, rettv=0x7ffdd216b930, argcount_in=0, argvars_in=0x7ffdd216b6d0, argv_func=0x0,
firstline=2, lastline=2, doesrange=0x7ffdd216b92c, evaluate=true, partial=0x0, selfdict_in=0x0) at /home/foo/src/github.com/neovim/src/nvim/eval.c:7687
#13 0x000000000048a6f0 in get_func_tv (name=0x7fb6348f3ee0 "vimfiler#view#_redraw_all_vimfiler", len=34, rettv=0x7ffdd216b930, arg=0x7ffdd216b948, firstline=2, lastline=2, doesrange=0x7ffdd216b92c,
evaluate=1, partial=0x0, selfdict=0x0) at /home/foo/src/github.com/neovim/src/nvim/eval.c:7459
#14 0x0000000000489691 in ex_call (eap=0x7ffdd216bc18) at /home/foo/src/github.com/neovim/src/nvim/eval.c:2817
#15 0x00000000004fae46 in do_one_cmd (cmdlinep=0x7ffdd216bef8, flags=7, cstack=0x7ffdd216bf00, fgetline=0x539820 <getnextac>, cookie=0x7ffdd216c508)
at /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:2198
#16 0x00000000004f6ae3 in do_cmdline (cmdline=0x0, fgetline=0x539820 <getnextac>, cookie=0x7ffdd216c508, flags=7) at /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:601
#17 0x00000000005390ee in apply_autocmds_group (event=EVENT_VIMRESIZED, fname=0x7fb6348ed2c0 "/home/foo/src/github.com/neovim/build/vimfiler:default", fname_io=0x0, force=false, group=-3,
buf=0x7fb634858000, eap=0x0) at /home/foo/src/github.com/neovim/src/nvim/fileio.c:6882
#18 0x000000000052f67c in apply_autocmds (event=EVENT_VIMRESIZED, fname=0x0, fname_io=0x0, force=false, buf=0x7fb634858000) at /home/foo/src/github.com/neovim/src/nvim/fileio.c:6527
#19 0x0000000000640df2 in screenalloc (doclear=false) at /home/foo/src/github.com/neovim/src/nvim/screen.c:6234
#20 0x00000000006320d2 in screenclear () at /home/foo/src/github.com/neovim/src/nvim/screen.c:6277
#21 0x0000000000641edf in screen_resize (width=49, height=56) at /home/foo/src/github.com/neovim/src/nvim/screen.c:7366
#22 0x00000000006b2d82 in ui_refresh () at /home/foo/src/github.com/neovim/src/nvim/ui.c:175
#23 0x00000000006b3121 in ui_refresh_event (argv=0x7ffdd216c748) at /home/foo/src/github.com/neovim/src/nvim/ui.c:181
#24 0x00000000004d8297 in multiqueue_process_events (this=0x7fb634812370) at /home/foo/src/github.com/neovim/src/nvim/event/multiqueue.c:146
#25 0x00000000004d7616 in loop_poll_events (loop=0x96e900 <main_loop>, ms=-1) at /home/foo/src/github.com/neovim/src/nvim/event/loop.c:56
#26 0x00000000005eb635 in input_poll (ms=-1) at /home/foo/src/github.com/neovim/src/nvim/os/input.c:326
#27 0x00000000005ea700 in inbuf_poll (ms=-1) at /home/foo/src/github.com/neovim/src/nvim/os/input.c:348
#28 0x00000000005ea61d in os_inchar (buf=0x0, maxlen=0, ms=-1, tb_change_cnt=0) at /home/foo/src/github.com/neovim/src/nvim/os/input.c:110
#29 0x000000000068e0af in state_enter (s=0x7ffdd216c888) at /home/foo/src/github.com/neovim/src/nvim/state.c:49
#30 0x00000000005ac514 in normal_enter (cmdwin=false, noexmode=false) at /home/foo/src/github.com/neovim/src/nvim/normal.c:463
#31 0x0000000000565c62 in main (argc=9, argv=0x7ffdd216cc28) at /home/foo/src/github.com/neovim/src/nvim/main.c:540
---
ASAN trace after provoking the bug with VimFiler:
=================================================================
==8540==ERROR: AddressSanitizer: heap-use-after-free on address 0x613000054748 at pc 0x0000007d1dd8 bp 0x7ffe71be6660 sp 0x7ffe71be6658
READ of size 4 at 0x613000054748 thread T0
#0 0x7d1dd7 in copy_tv /home/foo/src/github.com/neovim/src/nvim/eval.c:20116:37
#1 0x87b92c in f_get /home/foo/src/github.com/neovim/src/nvim/eval.c:9895:5
#2 0x7b35c0 in call_func /home/foo/src/github.com/neovim/src/nvim/eval.c:7286:11
#3 0x7c8d7a in get_func_tv /home/foo/src/github.com/neovim/src/nvim/eval.c:7091:11
#4 0x8667f9 in eval7 /home/foo/src/github.com/neovim/src/nvim/eval.c:4353:15
#5 0x8621e5 in eval6 /home/foo/src/github.com/neovim/src/nvim/eval.c:4073:7
#6 0x85ce69 in eval5 /home/foo/src/github.com/neovim/src/nvim/eval.c:3925:7
#7 0x858071 in eval4 /home/foo/src/github.com/neovim/src/nvim/eval.c:3666:7
#8 0x857613 in eval3 /home/foo/src/github.com/neovim/src/nvim/eval.c:3588:7
#9 0x856bb3 in eval2 /home/foo/src/github.com/neovim/src/nvim/eval.c:3525:7
#10 0x7ab772 in eval1 /home/foo/src/github.com/neovim/src/nvim/eval.c:3458:7
#11 0x7abe36 in eval1 /home/foo/src/github.com/neovim/src/nvim/eval.c:3494:9
#12 0x7a9ecc in eval0 /home/foo/src/github.com/neovim/src/nvim/eval.c:3420:9
#13 0x830cac in ex_return /home/foo/src/github.com/neovim/src/nvim/eval.c:22191:10
#14 0xb06a1c in do_one_cmd /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:2198:5
#15 0xae5557 in do_cmdline /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:601:20
#16 0x7f2490 in call_user_func /home/foo/src/github.com/neovim/src/nvim/eval.c:21993:3
#17 0x7b2eee in call_func /home/foo/src/github.com/neovim/src/nvim/eval.c:7271:11
#18 0x7c8d7a in get_func_tv /home/foo/src/github.com/neovim/src/nvim/eval.c:7091:11
#19 0x8667f9 in eval7 /home/foo/src/github.com/neovim/src/nvim/eval.c:4353:15
#20 0x8621e5 in eval6 /home/foo/src/github.com/neovim/src/nvim/eval.c:4073:7
#21 0x85ce69 in eval5 /home/foo/src/github.com/neovim/src/nvim/eval.c:3925:7
#22 0x858071 in eval4 /home/foo/src/github.com/neovim/src/nvim/eval.c:3666:7
#23 0x857613 in eval3 /home/foo/src/github.com/neovim/src/nvim/eval.c:3588:7
#24 0x856bb3 in eval2 /home/foo/src/github.com/neovim/src/nvim/eval.c:3525:7
#25 0x7ab772 in eval1 /home/foo/src/github.com/neovim/src/nvim/eval.c:3458:7
#26 0x7a9ecc in eval0 /home/foo/src/github.com/neovim/src/nvim/eval.c:3420:9
#27 0x7b78f2 in ex_let /home/foo/src/github.com/neovim/src/nvim/eval.c:1479:9
#28 0xb06a1c in do_one_cmd /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:2198:5
#29 0xae5557 in do_cmdline /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:601:20
#30 0x7f2490 in call_user_func /home/foo/src/github.com/neovim/src/nvim/eval.c:21993:3
#31 0x7b2eee in call_func /home/foo/src/github.com/neovim/src/nvim/eval.c:7271:11
#32 0x7c8d7a in get_func_tv /home/foo/src/github.com/neovim/src/nvim/eval.c:7091:11
#33 0x7c1d3d in ex_call /home/foo/src/github.com/neovim/src/nvim/eval.c:2843:9
#34 0xb06a1c in do_one_cmd /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:2198:5
#35 0xae5557 in do_cmdline /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:601:20
#36 0x7f2490 in call_user_func /home/foo/src/github.com/neovim/src/nvim/eval.c:21993:3
#37 0x7b2eee in call_func /home/foo/src/github.com/neovim/src/nvim/eval.c:7271:11
#38 0x7c8d7a in get_func_tv /home/foo/src/github.com/neovim/src/nvim/eval.c:7091:11
#39 0x7c1d3d in ex_call /home/foo/src/github.com/neovim/src/nvim/eval.c:2843:9
#40 0xb06a1c in do_one_cmd /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:2198:5
#41 0xae5557 in do_cmdline /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:601:20
#42 0xca2918 in apply_autocmds_group /home/foo/src/github.com/neovim/src/nvim/fileio.c:6882:5
#43 0xc6c446 in apply_autocmds /home/foo/src/github.com/neovim/src/nvim/fileio.c:6527:10
#44 0x140f374 in screenalloc /home/foo/src/github.com/neovim/src/nvim/screen.c:6234:5
#45 0x13958d1 in screenclear /home/foo/src/github.com/neovim/src/nvim/screen.c:6277:3
#46 0x1417573 in screen_resize /home/foo/src/github.com/neovim/src/nvim/screen.c:7366:5
#47 0x17fb59b in ui_refresh /home/foo/src/github.com/neovim/src/nvim/ui.c:175:3
#48 0x17fc100 in ui_refresh_event /home/foo/src/github.com/neovim/src/nvim/ui.c:181:3
#49 0xa05bbf in multiqueue_process_events /home/foo/src/github.com/neovim/src/nvim/event/multiqueue.c:146:7
#50 0x9ff8b6 in loop_poll_events /home/foo/src/github.com/neovim/src/nvim/event/loop.c:56:3
#51 0x120d584 in input_poll /home/foo/src/github.com/neovim/src/nvim/os/input.c:326:3
#52 0x12092ef in inbuf_poll /home/foo/src/github.com/neovim/src/nvim/os/input.c:348:24
#53 0x1209193 in os_inchar /home/foo/src/github.com/neovim/src/nvim/os/input.c:110:18
#54 0x16d3615 in state_enter /home/foo/src/github.com/neovim/src/nvim/state.c:49:13
#55 0x101090b in normal_enter /home/foo/src/github.com/neovim/src/nvim/normal.c:463:3
#56 0xdd0a82 in main /home/foo/src/github.com/neovim/src/nvim/main.c:542:3
#57 0x7f3c61df42b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)
#58 0x44b959 in _start (/home/foo/src/github.com/neovim/build/bin/nvim+0x44b959)
0x613000054748 is located 8 bytes inside of 352-byte region [0x613000054740,0x6130000548a0)
freed by thread T0 here:
#0 0x4e9d70 in __interceptor_cfree.localalias.0 (/home/foo/src/github.com/neovim/build/bin/nvim+0x4e9d70)
#1 0xefa184 in xfree /home/foo/src/github.com/neovim/src/nvim/memory.c:130:3
#2 0x7e52b5 in dict_free_dict /home/foo/src/github.com/neovim/src/nvim/eval.c:6431:3
#3 0x7e1e2c in free_unref_items /home/foo/src/github.com/neovim/src/nvim/eval.c:6063:7
#4 0x7946cd in garbage_collect /home/foo/src/github.com/neovim/src/nvim/eval.c:5985:16
#5 0xd08f4f in before_blocking /home/foo/src/github.com/neovim/src/nvim/getchar.c:1331:5
#6 0x1209157 in os_inchar /home/foo/src/github.com/neovim/src/nvim/os/input.c:109:9
#7 0x16d3615 in state_enter /home/foo/src/github.com/neovim/src/nvim/state.c:49:13
#8 0x101090b in normal_enter /home/foo/src/github.com/neovim/src/nvim/normal.c:463:3
#9 0xdd0a82 in main /home/foo/src/github.com/neovim/src/nvim/main.c:542:3
#10 0x7f3c61df42b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)
previously allocated by thread T0 here:
#0 0x4e9f08 in malloc (/home/foo/src/github.com/neovim/build/bin/nvim+0x4e9f08)
#1 0xef9ee4 in try_malloc /home/foo/src/github.com/neovim/src/nvim/memory.c:84:15
#2 0xefa0a4 in xmalloc /home/foo/src/github.com/neovim/src/nvim/memory.c:118:15
#3 0x78bcc6 in dict_alloc /home/foo/src/github.com/neovim/src/nvim/eval.c:6321:15
#4 0x86dc02 in get_dict_tv /home/foo/src/github.com/neovim/src/nvim/eval.c:6789:9
#5 0x865751 in eval7 /home/foo/src/github.com/neovim/src/nvim/eval.c:4296:21
#6 0x8621e5 in eval6 /home/foo/src/github.com/neovim/src/nvim/eval.c:4073:7
#7 0x85ce69 in eval5 /home/foo/src/github.com/neovim/src/nvim/eval.c:3925:7
#8 0x858071 in eval4 /home/foo/src/github.com/neovim/src/nvim/eval.c:3666:7
#9 0x857613 in eval3 /home/foo/src/github.com/neovim/src/nvim/eval.c:3588:7
#10 0x856bb3 in eval2 /home/foo/src/github.com/neovim/src/nvim/eval.c:3525:7
#11 0x7ab772 in eval1 /home/foo/src/github.com/neovim/src/nvim/eval.c:3458:7
#12 0x7a9ecc in eval0 /home/foo/src/github.com/neovim/src/nvim/eval.c:3420:9
#13 0x7b78f2 in ex_let /home/foo/src/github.com/neovim/src/nvim/eval.c:1479:9
#14 0xb06a1c in do_one_cmd /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:2198:5
#15 0xae5557 in do_cmdline /home/foo/src/github.com/neovim/src/nvim/ex_docmd.c:601:20
#16 0x7f2490 in call_user_func /home/foo/src/github.com/neovim/src/nvim/eval.c:21993:3
#17 0x7b2eee in call_func /home/foo/src/github.com/neovim/src/nvim/eval.c:7271:11
#18 0x7c8d7a in get_func_tv /home/foo/src/github.com/neovim/src/nvim/eval.c:7091:11
#19 0x8667f9 in eval7 /home/foo/src/github.com/neovim/src/nvim/eval.c:4353:15
#20 0x8621e5 in eval6 /home/foo/src/github.com/neovim/src/nvim/eval.c:4073:7
#21 0x85ce69 in eval5 /home/foo/src/github.com/neovim/src/nvim/eval.c:3925:7
#22 0x858071 in eval4 /home/foo/src/github.com/neovim/src/nvim/eval.c:3666:7
#23 0x857613 in eval3 /home/foo/src/github.com/neovim/src/nvim/eval.c:3588:7
#24 0x856bb3 in eval2 /home/foo/src/github.com/neovim/src/nvim/eval.c:3525:7
#25 0x7ab772 in eval1 /home/foo/src/github.com/neovim/src/nvim/eval.c:3458:7
#26 0x93f89a in filter_map_one /home/foo/src/github.com/neovim/src/nvim/eval.c:9398:7
#27 0x93f33a in filter_map /home/foo/src/github.com/neovim/src/nvim/eval.c:9372:13
#28 0x8ceb57 in f_map /home/foo/src/github.com/neovim/src/nvim/eval.c:12900:3
#29 0x7b35c0 in call_func /home/foo/src/github.com/neovim/src/nvim/eval.c:7286:11
SUMMARY: AddressSanitizer: heap-use-after-free /home/foo/src/github.com/neovim/src/nvim/eval.c:20116:37 in copy_tv
Shadow bytes around the buggy address:
0x0c2680002890: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c26800028a0: fd fd fd fd fa fa fa fa fa fa fa fa fa fa fa fa
0x0c26800028b0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c26800028c0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c26800028d0: fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa fa
=>0x0c26800028e0: fa fa fa fa fa fa fa fa fd[fd]fd fd fd fd fd fd
0x0c26800028f0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c2680002900: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c2680002910: fd fd fd fd fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2680002920: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c2680002930: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==8540==ABORTING
Problem: Two test files for increment/decrement.
Solution: Move the old style test into the new style test. (Hirohito
Higashi, closesvim/vim#881)
52df117df7
Problem: No test for what 7.4.1948 fixes.
Solution: Add a test. (Hirohito Higashi, closesvim/vim#880)
d388d2ac8b
Some adjustments had to be made from upstream since nvim always uses
utf-8 internally.
* Removed the 'set encoding=cp932' line from the test
* Adjusted the expected values for getpos(), since the number of bytes
is different in utf-8
Problem: Using the system default encoding makes tests unpredictable.
Solution: Always use utf-8 or latin1 in the new style tests. Remove setting
encoding and scriptencoding where it is not needed.
ac105ed3c4
Problem: Starting diff mode with the cursor in the last line might end up
only showing one closed fold. (John Beckett)
Solution: Scroll the window to show the same relative cursor position.
46328f9a1c
Problem: Internally used commands for CTRL-Z and mouse click end up in
history. (Matthew Malcomson)
Solution: Use do_cmdline_cmd() instead of stuffing them in the readahead
buffer. (James McCoy, closesvim/vim#1395)
25b0e6b701Closes#5966Closes#5967
Problem: When checking for CTRL-C typed the GUI may detect a screen resize
and redraw the screen, causing trouble.
Solution: Set updating_screen in ui_breakcheck().
e3caa11090
v7.4.2024 changed a few function signatures of functions that we use in
Neovim-specific code, e.g. the API.
Due to that the commit for 7.4.2024 doesn't build on its own, only together with
this commit.
Problem: More buf_valid() calls can be optimized.
Solution: Use bufref_valid() instead.
NOTE: Some changes related to channels and the Python and Netbeans interfaces
were obviously left out.
7c0a2f367f
Problem: buflist_findname_stat() may find a dummy buffer.
Solution: Set the BF_DUMMY flag after loading a dummy buffer. Start
finding buffers from the end of the list.
NOTE: In Neovim, buflist_findname_stat() was replaced by
buflist_findname_file_id() in c41535d69.
ea3f2e7be4
Problem: buf_valid() can be slow when there are many buffers.
Solution: Add bufref_valid(), only go through the buffer list
when a buffer was freed.
b25f9a97e9
Problem: When there are many errors adding them to the quickfix list takes
a long time.
Solution: Add BLN_NOOPT. Don't call buf_valid() in buf_copy_options().
Remember the last file name used. When going through the buffer
list start from the end of the list. Only call buf_valid() when
autocommands were executed.
8240433f48
Problem: When update_single_line() is called recursively, or another screen
update happens while it is busy, errors may occur.
Solution: Check and update updating_screen. (Christian Brabandt)
070b33da93
