multiline search regex wildcard not expanding

[Gooberpatrol66]

Please tick this box to confirm you have reviewed the above.

• I have a different issue.

What version of ripgrep are you using?

13.0.0

How did you install ripgrep?

guix

What operating system are you using ripgrep on?

guix

Describe your bug.

ripgrep is searching for the regex literally

What are the steps to reproduce the behavior?

$ rg --multiline '<<<<<<< HEAD.*>>>>>>>'

$ cat test
<<<<<<< HEAD
A
=======
B
>>>>>>>

What is the actual behavior?

scripts/git-hooks/dont-commit-with-merge-conflicts.sh
3:#when https://issues.guix.gnu.org/67450 fix is upstreamed, replace below with git diff | grep -P '<<<<<<< HEAD(.|\n)*>>>>>>>'
13:#git diff $against | tr '\n' '\a' | grep --color=always '<<<<<<< HEAD.*=======.*>>>>>>>' | tr '\a' '\n'
14:grep -r --color=always '<<<<<<< HEAD.*=======.*>>>>>>>' | tr '\a' '\n'
- 

What is the expected behavior?

it finds file test

[BurntSushi]

As in virtually every regex engine, the . in ripgrep's regex engine matches any character except a newline. Notice how one of your grep commands uses (.|\n).

There are many ways to achieve your goal:

$ rg --multiline '<<<<<<< HEAD.*>>>>>>>'
$ rg --multiline --multiline-dotall '<<<<<<< HEAD.*>>>>>>>'
test
1:<<<<<<< HEAD
2:A
3:=======
4:B
5:>>>>>>>
$ rg --multiline '<<<<<<< HEAD(?s:.)*>>>>>>>'
test
1:<<<<<<< HEAD
2:A
3:=======
4:B
5:>>>>>>>
$ rg --multiline '<<<<<<< HEAD\p{any}*>>>>>>>'
test
1:<<<<<<< HEAD
2:A
3:=======
4:B
5:>>>>>>>