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Build sometimes fails with "probe of /dev/loop1p2 failed, cannot detect existing filesystem."

I assume it is some kind of race condition or bug in TCG:

++ losetup --find --partscan --show image.img
+ LOOPDEV=/dev/loop1
+ mkfs.btrfs /dev/loop1p2
btrfs-progs v5.7 
See http://btrfs.wiki.kernel.org for more information.
probe of /dev/loop1p2 failed, cannot detect existing filesystem.
ERROR: use the -f option to force overwrite of /dev/loop1p2
+ cleanup
+ set +o errexit
+ '[' -n /dev/loop1 ']'
+ losetup -d /dev/loop1
+ '[' -n /mnt/scratch-disk/tmp/tmp.2kEpBP43dh/mount ']'
+ mountpoint -q /mnt/scratch-disk/tmp/tmp.2kEpBP43dh/mount
+ '[' -n /mnt/scratch-disk/tmp/tmp.2kEpBP43dh ']'
+ rm -rf /mnt/scratch-disk/tmp/tmp.2kEpBP43dh

Failed builds:

Edited by Kristian Klausen
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information