Detailed steps to reproduce the problem?

Run https://gist.github.com/AlekSi/c2f20c5f6dfa86115be5453b746f47a4

See this:

Marshalled

bson.D{bson.E

Unknown macro: {Key}

, bson.E{Key:"regex", Value:bson.Regex

Unknown macro: {Pattern}

}}

as

{"string":"\"","regex":{"$regularExpression":

Unknown macro: {"pattern"}

}}

Note that the double quote symbol is escaped inside the string but not inside regex. The generated JSON is invalid because of that.

Definition of done: what must be done to consider the task complete?

The generated JSON should be valid.

The exact Go version used, with patch level:

$ go version

go version go1.23.5 darwin/arm64

The exact version of the Go driver used:

$ go list -m go.mongodb.org/mongo-driver

go: module go.mongodb.org/mongo-driver: not a known dependency

The right command is "go list -m go.mongodb.org/mongo-driver/v2":

go.mongodb.org/mongo-driver/v2 v2.0.0

Describe how MongoDB is set up. Local vs Hosted, version, topology, load balanced, etc.

N/A.

The operating system and version (e.g. Windows 7, OSX 10.8, ...)

Doesn't matter.

Security Vulnerabilities{}

If you’ve identified a security vulnerability in a driver or any other MongoDB project, please report it according to the instructions here