TypeError: blocks.map is not function

[toints]

When I killed the pool server and restart it, occured this error:

TypeError: blocks.map is not a function
at cryptonote-nodejs-pool/lib/blockUnlocker.js:120:31
at nextTask (cryptonote-nodejs-pool/node_modules/async/dist/async.js:5756:27)
at next (cryptonote-nodejs-pool/node_modules/async/dist/async.js:5764:13)
at cryptonote-nodejs-pool/node_modules/async/dist/async.js:324:20
at cryptonote-nodejs-pool/lib/blockUnlocker.js:113:5
at err (cryptonote-nodejs-pool/node_modules/async/dist/async.js:2926:29)
at wrapper (cryptonote-nodejs-pool/node_modules/async/dist/async.js:271:20)
at iteratorCallback (cryptonote-nodejs-pool/node_modules/async/dist/async.js:496:17)
at cryptonote-nodejs-pool/node_modules/async/dist/async.js:324:20
at iteratee (cryptonote-nodejs-pool/node_modules/async/dist/async.js:2923:17)
at cryptonote-nodejs-pool/lib/blockUnlocker.js:104:6
at cryptonote-nodejs-pool/lib/apiInterfaces.js:66:3
at IncomingMessage. (cryptonote-nodejs-pool/lib/apiInterfaces.js:41:5)
at IncomingMessage.emit (events.js:203:15)
at endReadableNT (_stream_readable.js:1145:12)
at process._tickCallback (internal/process/next_tick.js:63:19)