The Nines Error

[chlohal]

What We Know about The Nines Error

• It is an IndexOutOfBoundsException
• It has this message: User code threw uncaught exception java.lang.IndexOutOfBoundsException: Index: 9, Size: 9
• It happens in both Autoauto and teleop
• It is not triggered by any 1 control (we have tests for that)
• It is not triggered by any 2-control combo (we have tests for that)
• It does not happen instantly
• The index is always 9
• It happens in the main thread, not any other thread
• It's not caused by any literal 9s in the code

What we Don't Know about The Nines Error

• Where it happens
• Is it an array? An arraylist? Something else that throws IndexOutOfBoundsException?
• Does it always happen eventually? Does it only happen sometimes?
• Why is it always nine????? Is nine important to the coding gods???

What we Should Probably Do about The Nines Error

i mean fix it ig

[moekofi]

NEW INFORMATION ABOUT THE NINES ERROR

The nines error is something to do with the hardwaremap/manipulation manager OR the omnidrive

This conclusions was reached due to multiple factors:

• The nines error happens during teleop, after init
• the only lines of code in teleop's loop is inputs, omnidrive, and telemetry
• inputs is not the issue, because inputs are not used in autonomous
• Telemetry is not the issue, because telemetry uses a hashmap, not an array
• The only line of code left is driver.driveOmni(input.getFloatArrayOfInput("drivingControls"));
• Furthermore, we know we have exactly 9 hardware devices

When looking for the error, look for a situation where the hardwaremap, manipulation manager, and/or the omnidrive code (specifically omnidrive!) tries to access an array index.

[chlohal]

We haven't seen this for like... a month. I'm gonna close it as couldnt-reproduce for now.