Detailed steps to reproduce the problem?

• Use Client.BulkWrite to do an insert.
• Repeat that operation so that it causes a dupe-key error.
• fmt.Printf("%v", mongo.ErrorCodes(bulkErr))

OBSERVE: No error codes are printed.
EXPECTED: Should see a dupe-key error.

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

The above should work as it does with WriteException and BulkWriteException.

The exact Go version used, with patch level:

1.25.7

The exact version of the Go driver used:

2.5.0

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, ...)

macOS

Security Vulnerabilities

n/a