~/Documents/gitroot/mongo-tools/bin/mongorestore --numInsertionWorkersPerCollection=-1

panic: runtime error: makechan: size out of range

goroutine 21 [running]:
runtime.panic(0x25cd40, 0x3ed6bf)
/usr/local/Cellar/go/1.3/libexec/src/pkg/runtime/panic.c:279 +0xf5
github.com/mongodb/mongo-tools/mongorestore.(*MongoRestore).RestoreCollectionToDB(0xc2080493b0, 0xc20800f285, 0xd, 0xc2080a07c3, 0xe, 0xc2080c4180, 0x3b6eb99, 0x0, 0x0)
/Users/amidvidy/Documents/gitroot/mongo-tools/.gopath/src/github.com/mongodb/mongo-tools/mongorestore/restore.go:234 +0x69b
github.com/mongodb/mongo-tools/mongorestore.(*MongoRestore).RestoreIntent(0xc2080493b0, 0xc208050690, 0x0, 0x0)
/Users/amidvidy/Documents/gitroot/mongo-tools/.gopath/src/github.com/mongodb/mongo-tools/mongorestore/restore.go:176 +0x18ab
github.com/mongodb/mongo-tools/mongorestore.func·002(0x0)
/Users/amidvidy/Documents/gitroot/mongo-tools/.gopath/src/github.com/mongodb/mongo-tools/mongorestore/restore.go:40 +0x1ed
created by github.com/mongodb/mongo-tools/mongorestore.(*MongoRestore).RestoreIntents
/Users/amidvidy/Documents/gitroot/mongo-tools/.gopath/src/github.com/mongodb/mongo-tools/mongorestore/restore.go:49 +0x1b8

....