[Cin] Complete system hangs (likely out of memory)

[Phyllis Smith]

Just a little feedback too.
1) "does closing the *viewer*, release the memory" -- I could be wrong, but
I do not think closing the viewer releases the memory because it thinks you
may want to use it again?
2) "backups on /tmp"? -- I am not sure how you are getting backups to go to
/tmp.  As far as I know they always go to $HOME/.bcast5.  If you see files
like:

backup.prev_20230122_113922
backup.prev_20230122_114222
backup.prev
backup.xml

going to /tmp, then that could be a bug because I don't know how they got
there.  Index files, marker files, snapshot files, and nested proxy files
can be written somewhere else via Settings->Preferences, but not backups.
3) I have found that adding swap is a complete waste of time - it never
works for me and just hangs (and that has been true for me since the
1980's!)
4) in Valgrind, I always look at these lines at the end of the file:
    ==128034== LEAK SUMMARY:
    ==128034==    definitely lost: 5,086 bytes in 40 blocks
    ==128034==    i*ndirectly lost: 15,535,063 bytes *in 1,143 blocks
    ==128034==      possibly lost: 350,864 bytes in 10 blocks
The "definitely lost" line is reasonable BUT "indirectly lost" seems
astronomical.

>
> so, something leaks but is it due to mussing free() on exit or also the
> case for normal operations ... it seems cache is involved, so may be I
> messed this up somehow. Does leak exist in previous cin-gg, like one from
> 2021 or 2020?
>
I am going to test this too.
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