Fix possible stack overflows when parsing nested blocks
Fix possible stack overflows when parsing nested blocks

WindStill/redcarpet,emq/redcarpet,kaneshin/redcarpet,vmg/redcarpet,cjlittle/redcarpet_legalcitations,cjlittle/redcarpet_legalcitations,fukayatsu/redcarpet,kattybilly/redcarpet,gitcafe-dev/redcarpet,emq/redcarpet,JuanitoFatas/redcarpet,fukayatsu/redcarpet,rkh/redcarpet,be9/redcarpet,Hacker0x01/redcarpet,emq/redcarpet,JuanitoFatas/redcarpet,be9/redcarpet,WindStill/redcarpet,kattybilly/redcarpet,fukayatsu/redcarpet,increments/greenmat,rkh/redcarpet,liquorburn/redcarpet,vmg/redcarpet,peripia/redcarpet,be9/redcarpet,kevinsawicki/redcarpet,peripia/redcarpet,liquorburn/redcarpet,vmg/redcarpet,peripia/redcarpet,Hacker0x01/redcarpet,kevinsawicki/redcarpet,vmg/redcarpet,increments/greenmat,emq/redcarpet,Hacker0x01/redcarpet,kattybilly/redcarpet,emiddleton/redcarpet,be9/redcarpet,kevinsawicki/redcarpet,rkh/redcarpet,cjlittle/redcarpet_legalcitations,kattybilly/redcarpet,emiddleton/redcarpet,liquorburn/redcarpet,JuanitoFatas/redcarpet,Hacker0x01/redcarpet,kaneshin/redcarpet,kaneshin/redcarpet,kaneshin/redcarpet,WindStill/redcarpet,gitcafe-dev/redcarpet,increments/greenmat,fukayatsu/redcarpet,liquorburn/redcarpet,gitcafe-dev/redcarpet,emiddleton/redcarpet,increments/greenmat