# For contextual positioning statements with in-line single positioning rules,
# zeroes should get compiled to ValueRecord format 0.
# https://github.com/fonttools/fonttools/issues/633

# Zero value in a vertical context.
feature vkrn {
    pos A G' 0 A;          # value format A
    pos B G' <0 0 0 0> B;  # value format B
} vkrn;