See review D24485 for the patch. Each update breaks ABI and sometimes API.
For some reason, I can't recover from a burnout (not limited to Boost) in order to fix known bustage and hand over for an exp-run to uncover more. Given 1.74.0 is around the corner focusing on 1.73.0 may not be a good idea anymore.
*** Bug 250677 has been marked as a duplicate of this bug. ***
1.75.0 is out as of December 11th, 2020