[crc_len=2 (legal minimum)] canary intact: no underflow write (crc_len guard fired).

=== summary ===
crc_len=0 -> BUG (underflow write)
crc_len=1 -> BUG (underflow write)
crc_len=2 -> no bug (control: must be 'no bug')

>>> OVERALL: BUG CONFIRMED — crom_parse_text writes out of bounds when crc_len < 2.
RUN_EXIT=0