REG_EBRACK_IDX    158 maint/gnulib/lib/regcomp.c #define REG_EPAREN_IDX	(REG_EBRACK_IDX + sizeof "Unmatched [, [^, [:, [., or [=")
REG_EBRACK_IDX    195 maint/gnulib/lib/regcomp.c     REG_EBRACK_IDX,