FT.SEARCH Query syntax error with ?

[finalgamer]

Describe the bug
When a tag field match contains a ? there is always a ERR Query syntax error response.

This seems to currently make it impossible to query a tag field that contains a ?

To Reproduce
Steps to reproduce the behavior:

// 1. Setup the index
FT.CREATE demo_idx ON HASH PREFIX 1 doc: SCHEMA tags TAG 

// 2. Add some documents (optional)
HSET doc:1 name "First Item" tags "?first"
HSET doc:2 name "Second Item" tags "?second"
HSET doc:3 name "Third Item" tags "?third"

// 3. Execute the query
FT.SEARCH demo_idx "@tags:{\\\?second}" // ERR Query syntax error
FT.SEARCH demo_idx "@tags:{\\?second}" // ERR Query syntax error
FT.SEARCH demo_idx "@tags:{\?second}" // ERR Query syntax error
FT.SEARCH demo_idx "@tags:{?second}" // ERR Query syntax error

Expected behavior

The query should not result in an error at least when the ? is properly escaped with \\?

FT.SEARCH demo_idx "@tags:{\\\?second}" // Returns result on redis-search
FT.SEARCH demo_idx "@tags:{\\?second}" // Returns result on redis-search
FT.SEARCH demo_idx "@tags:{\?second}" // Returns empty result on redis-search
FT.SEARCH demo_idx "@tags:{?second}" // Returns empty result on redis-search

Environment (please complete the following information):

• OS: Ubuntu 22.04.5 LTS
• Kernel: 5.15.167.4-microsoft-standard-WSL2
• Containerized?: yes Docker
  docker run -p 6667:6379 docker.dragonflydb.io/dragonflydb/dragonfly:v1.29.0
• Dragonfly Version: 1.29.0

Reproducible Code Snippet

See above.

[vyavdoshenko]

@finalgamer
Thanks for reporting the bug.