What were you trying to do that didn't work?
When having a Linux system with two internet providers ("two default gateways") with source/policy-based routing configured properly, `mtr --address` does no longer work on RHEL 9, while it works on RHEL 7.

Please provide the package NVR for which bug is seen:
mtr-0.94-4.el9.x86_64

Additional details:

• Rebuilding MTR v0.94 from RHEL 9 for RHEL 7 breaks `mtr --address` on RHEL 7
• Rebuilding MTR v0.85 from RHEL 7 for RHEL 9 makes `mtr --address` working on RHEL 9

This must be related to a MTR change between v0.85 and v0.94 and the following issue at MTR upstream describes the quite well: https://github.com/traviscross/mtr/issues/232

Upstream commit https://github.com/traviscross/mtr/commit/74d312d7e67d002e184b37c7f278597ab06bf8e7.patch from https://github.com/traviscross/mtr/pull/484 solves the issue when adding the commit to MTR v0.94.

Expected results
`mtr --address` works on system with source/policy-based routing configured 

Actual results
`mtr --address` doesn't work on system with source/policy-based routing configured