Improve error of process.maps() after the process exited

[R42ccoon]

• Move the changes of Poll before reading /proc/maps in process.libs() to avoid race condition #2516 from libs() to maps() because maps() is called in others functions than libs() as stated in Fix poll error in process.libs() and clean up maps parsing #2579
• Return an error instead of sending the elf maps to avoid sending incorrect values

[R42ccoon]

Any news ?

[peace-maker]

Yes, sorry. Can you rebase to target dev now please? The changelog entry isn't descriptive enough, can you describe the impact of this change in more detail please? While I don't think it's intuitive to have process.maps return something when the process isn't running, we should document the change at least in the changelog if a poor soul relied on it to find a reason for the breakage.

[peace-maker]

ping @R42ccoon