Git Bug Report: out of memory using git tag

Thank you for filling out a Git bug report! Please answer the following questions to help us understand your issue.

What did you do before the bug happened? (Steps to reproduce your issue) I created a signed tag (git tag -s) using a ssh-agent key and then ran git tag -l --format '%(contents:body)' v0.6.1

What did you expect to happen? (Expected behavior) I get the output

What happened instead? (Actual behavior) fatal: Out of memory, malloc failed (tried to allocate 18446744073709551266 bytes)

What's different between what you expected and what actually happened? git tries to allocate an unreasonable amount of memory

Anything else you want to add: I don't have 18,000 PB of memory

Please review the rest of the bug report below. You can delete any lines you don't wish to share.

[System Info] git version: git version 2.38.1.280.g63bba4fdd8 cpu: x86_64 built from commit: 63bba4fdd86d80ef061c449daa97a981a9be0792 sizeof-long: 8 sizeof-size_t: 8 shell-path: /bin/sh uname: Linux 5.15.0-1021-aws #25~20.04.1-Ubuntu SMP Thu Sep 22 13:59:08 UTC 2022 x86_64 compiler info: gnuc: 9.4 libc info: glibc: 2.31 $SHELL (typically, interactive shell): /bin/bash

Cheers, /Martin