patch 8.0.0643: when a pattern search is slow Vim becomes unusable commit https://github.com/vim/vim/commit/fbd0b0af6800f6ff89857863d6a07ea03f09ff6c Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jun 17 18:44:21 2017 +0200 patch 8.0.0643: when a pattern search is slow Vim becomes unusable Problem: When 'hlsearch' is set and matching with the last search pattern is very slow, Vim becomes unusable. Cannot quit search by pressing CTRL-C. Solution: When the search times out set a flag and don't try again. Check for timeout and CTRL-C in NFA loop that adds states.

start:
'abcd'
'abcd'
'Dance'
'Dance'
{'var_str': 'Dance'}
{'var_str': 'Dance'}
'Chance'
{}
{}
''
'Chance'
0
0
[1, 2, 3]
[1, 2, 3]
{'var_list': [1, 2, 3], 'other': 777}
{'var_list': [1, 2, 3], 'other': 777}
[4, 5, 6, 7]
''
[4, 5, 6, 7]
''
[4, 5, 6, 7]
{'dict': 'tabwin'}
{'dict': 'tabwin'}
{'var_dict': {'dict': 'tabwin'}}
{'var_dict': {'dict': 'tabwin'}}
{'dict2': 'newval'}
{}
{}
''
{'dict2': 'newval'}
''
{'dict2': 'newval'}
''
1