maximum line length for regexp.FindAll*?

Is there a maximum length defined for text lines fed to the regexp.FindAll*Index() functions in the regexp package? Running the code below only provides the indices of the last 10 occurrences.

Go playground: https://play.golang.org/p/QgOw7TzuV4

package main

import (
    "fmt"
	"regexp"
)

func main() {
	line := `VAL_ Status 31 "31-Not Available" 30 "30-Not Defined" 29 "29-Not Defined" 28 "28-Received Temperature Msg" 27 "27 Temp Main (Sub-system)" 26 "26-Throttle Out of Correlation" 25 "25-Received Throttle Pos Msg" 24 "24-Received Throttle Position" 23 "23-Pedal Throttle Position" 22 "22-Throtttle Main (Sub-System)" 21 "21-Oil Makeup Pump Pressure" 20 "20-Engine/B-Average Speeds" 19 "19-A/D Power Regulator" 18 "18-Received Oil Temperature" 17 "17-Oil Temperature Main (IA)" 16 "16-B-Average Speed" 15 "15-Zero Stroke Position" 14 "14-Throttle Main (RVDT)" 13 "13-Engine Speed" 12 "12-Shift Mode Sel-Critical" 11 "11-Shift Mode Sel-Non Critical" 10 "10-Output Driver" 9 "9-Watchdog Off" 8 "8-Steer Gain Solenoid" 7 "7-Vehicle Driveability ID5" 6 "6-Vehicle Driveability ID4" 5 "5-Vehicle Driveability ID3" 4 "4-Vehicle Driveability ID2" 3 "3-Vehicle Driveability ID1" 2 "2-System Power" 1 "1-ROM" 0 "0-No Failures Detected" ;`
	re := regexp.MustCompile(" [0-9] ")

	fmt.Println(re.FindAllStringIndex(line, -1))
}

Yields:

[[677 680] [696 699] [722 725] [753 756] [784 787] [815 818] [846 849] [877 880] [896 899] [906 909]]

I've tried several of the FindAll*Index funcs and they're all the same.

There is no real limit on the number of matches. The reason your regex is not getting more matches is because it needs to be regexp.MustCompile(" [0-9]+ ") to match numbers with more than one digit, surrounded by spaces. Right now it only matches " 0 " through to " 9 ".