InfluxDB panic crashes while parsing "-" as Float

[PaoloSaul]

on version 0.10.0:

Error Output Line:
influxdb/models/points.go:1418

Likely Source of Error:
influxdb/models/points.go:1374

on version 0.10.0

Possible Solution:
check for non-numeric characters and parse those with len() == 1 as zero or something else.

panic: unable to parse number value '-': strconv.ParseFloat: parsing "-": invalid syntax

goroutine 146484 [running]:
github.com/influxdb/influxdb/models.newFieldsFromBinary(0xc381a7a837, 0x7, 0x175c9, 0x4)
/tmp/tmp.r1Nea5VXEw/src/github.com/influxdb/influxdb/models/points.go:1418 +0x63d
github.com/influxdb/influxdb/models.(_point).unmarshalBinary(0xc320f65710, 0xc2be8602c0)
/tmp/tmp.r1Nea5VXEw/src/github.com/influxdb/influxdb/models/points.go:1298 +0x3b
github.com/influxdb/influxdb/models.(_point).Fields(0xc320f65710, 0xc2ba0b9dd0)
/tmp/tmp.r1Nea5VXEw/src/github.com/influxdb/influxdb/models/points.go:1211 +0x41
github.com/influxdb/influxdb/tsdb.(_Shard).validateSeriesAndFields(0xc2b6ab6840, 0xc364fc6000, 0x181c, 0x1e00, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
/tmp/tmp.r1Nea5VXEw/src/github.com/influxdb/influxdb/tsdb/shard.go:420 +0xbfc
github.com/influxdb/influxdb/tsdb.(_Shard).WritePoints(0xc2b6ab6840, 0xc364fc6000, 0x181c, 0x1e00, 0x0, 0x0)
/tmp/tmp.r1Nea5VXEw/src/github.com/influxdb/influxdb/tsdb/shard.go:202 +0xa6
github.com/influxdb/influxdb/tsdb.(*Store).WriteToShard(0xc2080e22c0, 0x5ec40, 0xc364fc6000, 0x181c, 0x1e00, 0x0, 0x0)
/tmp/tmp.r1Nea5VXEw/src/github.com/influxdb/influxdb/tsdb/store.go:442 +0x14e
github.com/influxdb/influxdb/cluster.func·002(0x5ec40, 0x1, 0xc364fc6000, 0x181c, 0x1e00)

[jwilder]

Reproduces this via the cli with:

insert cpu value=-

[PaoloSaul]

If you haven't tested this yet, this also crashes for any non-numeric value in the list of conditions in newFieldsFromBinary, like '.', '+'