Cannot import keyimage format version 2

[muff1nman]

[wallet XXXXXX]: import_key_images keyimages.dat
Error: Failed to import key images: Bad key image export file magic in keyimages.dat

$ dd if=keyimages.dat bs=24 count=1 of=/dev/stdout status=none | hexdump -C
00000000  4d 6f 6e 65 72 6f 20 6b  65 79 20 69 6d 61 67 65  |Monero key image|
00000010  20 65 78 70 6f 72 74 02                           | export.|
00000018

https://github.com/monero-project/monero/commit/8d71b2b1b3714a13d46247ed7342a1ad292c488d#diff-9d580668dab930045943902048e2ac22L116-R116

1. Why can't I import a keyimages v2 format?
2. Can I at least get an error message saying that the keyimage file is an older format?

[moneromooo-monero]

Are the two wallets not running the same version ? The file format changed to prevent possible exploits since the boost format we used has a few buffer overflows.

[muff1nman]

No the offline wallet was using an older version (and still is until I can recompile to deal with a glibc incompatibility). Since these are key image files I trust, I'm not worried about buffer overflows.

[hyc]

glibc incompatibility

Is it this one due to lgamma/signgam, or yet another one? #6862

[muff1nman]

2.23 Was the glibc version complained about but haven't looked into it beyond that.

[muff1nman]

I don't think its reasonable to prevent people from loading old keyimage files as it makes it impossible (correct me if I'm wrong) to restore an offline wallet completely without being able to import old saved keyimages.

[moneromooo-monero]

It's not preventing you from loading old format. It's preventing you from loading a new format.

[muff1nman]

Sure, but regardless one would still be stuck as if you setup a new offline wallet with the newest verison of monero you cannot get back to your previous state without being able to import older formats.