Comment # 1 on bug 1058855 from Arvin Schnell

Console log:

# parted /dev/sdb resizepart 1 50mb

# mkfs.btrfs -f /dev/sdb1
[...]
Devices:
   ID        SIZE  PATH
    1    46.68MiB  /dev/sdb1

# parted /dev/sdb resizepart 1 70m

# mount /dev/sdb1 /test

# btrfs filesystem resize max /test
Resize '/test' of 'max'
ERROR: unable to resize '/test': Invalid argument