replacements - $1 not recognized if followed by underscore

[brunetton]

What version of ripgrep are you using?

ripgrep 13.0.0

How did you install ripgrep?

Debian

What operating system are you using ripgrep on?

Ubuntu 22.04

Describe your bug.

Can't use $1 in replacements when followed by underscore

What are the steps to reproduce the behavior?

echo "hello" | rg '(.*)' -r '--$1_--'

What is the actual behavior?

DEBUG|rg::config|crates/core/config.rs:40: /home/bruno/.ripgreprc: arguments loaded from config file: ["--no-line-number"]
DEBUG|rg::args|crates/core/args.rs:543: final argv: ["rg", "--no-line-number", "(.*)", "-r", "--$1_--", "--debug"]
DEBUG|globset|/usr/share/cargo/registry/ripgrep-13.0.0/debian/cargo_registry/globset-0.4.8/src/lib.rs:421: built glob set; 0 literals, 0 basenames, 12 extensions, 0 prefixes, 0 suffixes, 0 required extensions, 0 regexes
----

What is the expected behavior?

Output should be: --hello_--

[BurntSushi]

Duplicate of #2201.

Use ${1} instead. Otherwise the _ is treated as part of the capture group reference.

[brunetton]

Sorry for the duplicate !