While trying to convert a ext4 filesystem to btrfs with the new btrfs-convert
from btrfs-progs-4.6 I
got the following error:
create btrfs filesystem:
blocksize: 4096
nodesize: 16384
features: extref, skinny-metadata (default)
creating ext2 image file.
Unable to find block group for 0
extent-tree.c:289: find_search_start: Assertion `1`
failed.
./btrfs-convert(btrfs_reserve_extent+0x8e9)[0x41979d]
./btrfs-convert(btrfs_alloc_free_block+0x50)[0x419b27]
./btrfs-convert[0x40b8d8]
./btrfs-convert(btrfs_search_slot+0x13f7)[0x40d9d6]
./btrfs-convert(btrfs_csum_file_block+0x3b5)[0x41f144]
./btrfs-convert[0x4387b1]
./btrfs-convert(main+0x2013)[0x43d180]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fca6bb895f0]
./btrfs-convert(_start+0x29)[0x4082b9]
Before I already tried btrfs-convert from btrfs-progs-4.5.2 which I
accidentally aborted but until then seemed to run fine.
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