Greetings I am facing the same issue at commit 41d05c7d65e3634e0986ac108ca8df68b141e9be which makes the switch to the patched libgit2@1.8 for guile-git:
カオス ~ > guix describe 29 Aug 1:38:38 Generation 63 Aug 29 2024 12:32:36 (current) guix 41d05c7 repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: 41d05c7d65e3634e0986ac108ca8df68b141e9be myguix 278e4df repository URL: https://github.com/b-vitamins/myguix.git branch: master commit: 278e4dfc6eb5f8e8651ae13fb8594d9a62718a92 カオス ~ > guix pull 29 Aug 1:38:52 Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'... Updating channel 'myguix' from Git repository at 'https://github.com/b-vitamins/myguix.git'... zsh: segmentation fault guix pull カオス ~ > guix pull --roll-back 29 Aug 1:39:05 switched from generation 63 to 62 カオス ~ > guix describe 29 Aug 1:39:08 Generation 62 Aug 29 2024 13:27:07 (current) guix 591972d repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: 591972dfa14d401621cb060b6aac45989c342cd8 myguix 278e4df repository URL: https://github.com/b-vitamins/myguix.git branch: master commit: 278e4dfc6eb5f8e8651ae13fb8594d9a62718a92 カオス ~ > guix pull 29 Aug 1:39:14 Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'... Updating channel 'myguix' from Git repository at 'https://github.com/b-vitamins/myguix.git'... Building from these channels: guix https://git.savannah.gnu.org/git/guix.git 41d05c7 myguix https://github.com/b-vitamins/myguix.git 278e4df Computing Guix derivation for 'x86_64-linux'... Sincerely, Ayan