question about regex

[Paul Eggert]

On 1/20/20 2:41 AM, liqingqing wrote:
> it's not a easy work to fix bug#24269 by modify the regex algorithm.
> a possible way is that add a backtrack limit to avoid infinite loop.

If there's an arbitrary backtrack limit, won't that cause the code to mishandle 
some regular expressions? That is, wouldn't an arbitrary limit cause the code to 
incorrectly fail to match in some cases? In some sense that would be worse than 
looping.

Perhaps I am misunderstanding what you're proposing. If so, could you give more 
details about the proposal?