Possible bad literal extraction

[brookst]

I was trying to search for IP addresses and ran into an odd problem. I tried the expression '(\d{1,3}\.){3}\d{1,3}' and found no matches. I changed from a fixed repetition of the subgroup to one or more - '(\d{1,3}\.)+\d{1,3}' - and got matches. Using the --debug flag I see that the first case looks for the wrong literal:

DEBUG:grep::literals: required literal found: "..."

The second case only looks for a single . as expected.

Is this a bug in the regex parsing or am I doing something wrong?

[BurntSushi]

It's a pretty sweet bug. This is indeed a bug in ripgrep's inner literal extraction. (Over aggressive literal extraction is one of the largest sources of bugs in the regex engine too.)