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==17349==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62400006800e at pc 0x7f5bbd9de747 bp 0x7ffde4667190 sp 0x7ffde4667188
WRITE of size 1 at 0x62400006800e thread T0
    #0 0x7f5bbd9de746 in win_line /home/michael/src/neovim/build/../src/nvim/screen.c:3889:7
    #1 0x7f5bbd97b399 in win_update /home/michael/src/neovim/build/../src/nvim/screen.c:1429:15
    #2 0x7f5bbd94b808 in update_screen /home/michael/src/neovim/build/../src/nvim/screen.c:424:7
    #3 0x7f5bbe3a24fb in main_loop /home/michael/src/neovim/build/../src/nvim/main.c:632:9
    #4 0x7f5bbe387a18 in main /home/michael/src/neovim/build/../src/nvim/main.c:495:3
    #5 0x7f5bbbc297ff in __libc_start_main (/usr/lib/libc.so.6+0x207ff)
    #6 0x7f5bbd81c1a8 in _start (/home/michael/src/neovim/build/bin/nvim+0x6ed1a8)

0x62400006800e is located 159 bytes to the right of 7791-byte region [0x624000066100,0x624000067f6f)
allocated by thread T0 here:
    #0 0x7f5bbd8a31a2 in malloc (/home/michael/src/neovim/build/bin/nvim+0x7741a2)
    #1 0x7f5bbe9aa515 in try_malloc /home/michael/src/neovim/build/../src/nvim/memory.c:60:15
    #2 0x7f5bbe9aad95 in xmalloc /home/michael/src/neovim/build/../src/nvim/memory.c:94:15
    #3 0x7f5bbda1a485 in screenalloc /home/michael/src/neovim/build/../src/nvim/screen.c:5960:21
    #4 0x7f5bbd94f801 in screenclear /home/michael/src/neovim/build/../src/nvim/screen.c:6143:3
    #5 0x7f5bbda2deaf in screen_resize /home/michael/src/neovim/build/../src/nvim/screen.c:7227:5
    #6 0x7f5bbf0ed507 in ui_refresh /home/michael/src/neovim/build/../src/nvim/ui.c:137:3
    #7 0x7f5bbf3e8166 in try_resize /home/michael/src/neovim/build/../src/nvim/tui/tui.c:205:3
    #8 0x7f5bbf2c27f7 in process_events_from /home/michael/src/neovim/build/../src/nvim/os/event.c:170:5
    #9 0x7f5bbf2c2d95 in event_poll /home/michael/src/neovim/build/../src/nvim/os/event.c:129:5
    #10 0x7f5bbf2b10e8 in os_breakcheck /home/michael/src/neovim/build/../src/nvim/os/input.c:132:5
    #11 0x7f5bbee7e7da in fast_breakcheck /home/michael/src/neovim/build/../src/nvim/misc1.c:2735:5
    #12 0x7f5bbe645fdb in nfa_regmatch /home/michael/src/neovim/build/../src/nvim/regexp_nfa.c:4826:3
    #13 0x7f5bbe6842a8 in recursive_regmatch /home/michael/src/neovim/build/../src/nvim/regexp_nfa.c:4526:12
    #14 0x7f5bbe64bb02 in nfa_regmatch /home/michael/src/neovim/build/../src/nvim/regexp_nfa.c:5087:20
    #15 0x7f5bbe640b9b in nfa_regtry /home/michael/src/neovim/build/../src/nvim/regexp_nfa.c:6084:16
    #16 0x7f5bbe63d0f3 in nfa_regexec_both /home/michael/src/neovim/build/../src/nvim/regexp_nfa.c:6244:12
    #17 0x7f5bbe63a5dd in nfa_regexec_multi /home/michael/src/neovim/build/../src/nvim/regexp_nfa.c:6446:10
    #18 0x7f5bbe635ca2 in vim_regexec_multi /home/michael/src/neovim/build/../src/nvim/regexp.c:7111:16
    #19 0x7f5bbea88499 in syn_regexec /home/michael/src/neovim/build/../src/nvim/syntax.c:2849:7
    #20 0x7f5bbe9d81fc in syn_current_attr /home/michael/src/neovim/build/../src/nvim/syntax.c:1801:20
    #21 0x7f5bbe9d0eec in get_syntax_attr /home/michael/src/neovim/build/../src/nvim/syntax.c:1583:12
    #22 0x7f5bbd9bfcca in win_line /home/michael/src/neovim/build/../src/nvim/screen.c:3199:25
    #23 0x7f5bbd97b399 in win_update /home/michael/src/neovim/build/../src/nvim/screen.c:1429:15
    #24 0x7f5bbd94b808 in update_screen /home/michael/src/neovim/build/../src/nvim/screen.c:424:7
    #25 0x7f5bbe3a24fb in main_loop /home/michael/src/neovim/build/../src/nvim/main.c:632:9
    #26 0x7f5bbe387a18 in main /home/michael/src/neovim/build/../src/nvim/main.c:495:3
    #27 0x7f5bbbc297ff in __libc_start_main (/usr/lib/libc.so.6+0x207ff)

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/michael/src/neovim/build/../src/nvim/screen.c:3889 win_line
Shadow bytes around the buggy address:
  0x0c4880004fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4880004fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4880004fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4880004fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 07 fa fa
  0x0c4880004ff0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c4880005000: fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4880005010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4880005020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4880005030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4880005040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4880005050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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
==17349==ABORTING