Current status: no such feature

Future:
- not as default for sure, because there are projects using the pattern of device memory re-use to build different binary blocks at the same position (savebin/savetap between).
- as option: possible... sounds like some work, to develop some simple and fast code for it, as there is no simple test (except having usage-bitmap for whole device memory, but that sounds ugly. But maybe there is some other way, maybe some lists of ranges and checking for overlaps.
- workaround: use less `ORG`, use more `ds/align` to advance to next block of code, use ASSERT or MMU with "w" or "e" mode to guard you against making current section bigger than what you expected, etc...

But it sounds like non-trivial thing to add, and also you should be able to work-around it with ASSERT quite well. Switching one option ON would be even better, but doesn't feel to me like critical feature needed ASAP.

But I will keep it on mind... (maybe add enhancement-issue on github so I don't forget about it )