We went from an old HLASM version at UI50739 to a new one at UI78656 (both these were delivered as part of z/OS ADCD bundled maintenance).
In the old version, the type attribute (T') of a macro operand of -1 was U; in the new one it is, not unreasonably, N. This seems like a positive change, but it actually broke a macro of ours that silently generated incorrect code for a few cases, and has forced us into an audit of as-built modules to be sure we haven't actually shipped anything with bad code. It's certainly arguable that our macro should have anticipated the possibility of an N, but nonetheless I really need to know when things like this are being changed. Where do I find a detailed list of this kind change at the various HLASM fix levels so I can anticipate things we need to look at? In our case we know which of a number of (perhaps overly fancy) macros we'd need to verify, just based on any mention of things like attribute changes. Of course I can get a list of all the HLASM APARs, but in many cases the subject line isn't reflective of the resulting changes, it's not easy to search for something like "T'", and going through each one is bit much. Looked at another way, how can I see a cumulative list of changes given the old and new versions as advertised on the title page (i.e. UI50739 to UI78656)? Thanks... Tony H.
