Android Question Error: java.lang.ArrayIndexOutOfBoundsException

slugger

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Hi,

in the logs panel I have seen the following error:

B4X: 
java.lang.ArrayIndexOutOfBoundsException: length=12; index=-1

I have 2 problems with that:

1. it seems to appear randomly from time to time, I haven't been able to reproduce it
2. that is the only red line showing up in the Logs panel, usually I get a bunch of red lines with an indication of the line of code which generates the error, in this case I get only that single line.

I use the IDE in Debug (legacy) mode.

My app seems to run fine, I haven't had any crashes nor unexpected breakpoints in the IDE but I'd still like to get rid of that error message.

Any hints on how I can track down the line that generates that error?


Thank you in advance.
 
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slugger

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Hi Erel,

exactly, that's all I see.

This is a sequential extract of what I read on the Logs tab:

B4X: 
** Activity (main) Pause, UserClosed = true **
java.lang.ArrayIndexOutOfBoundsException: length=12; index=-1
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **

Nothing in the middle, just that line.

I don't get any info on the line where the error is generated, not even a hint on what component is causing the error message to show up.
 
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slugger

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Erel said:
Are you using Try / Catch somewhere and printing the error?
Click to expand...

No, all my Try - Catch blocks end like this:

B4X: 
        Catch
            Log("Error 2: "&LastException.Message)
            generalError=True   
        End Try

Erel said:
Have you checked the unfiltered logs?
Click to expand...

I haven't thought about that, next time I'll see the error I'll uncheck the Filter box.

Erel said:
It is possible that this error happens inside a library which catches it.
Click to expand...

I hope it's nothing serious, as I said it seems it hasn't created problems to my program so far.



steve
 
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KMatle

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I know that message, too. So far I ignored it because it shows up randomly. Will post it here next time.
 
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paris7162

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I've been noticing it lately also, however, I largely ignore it. When I uncheck the Filter box on the Logs tab, it still only shows java.lang.ArrayIndexOutOfBoundsException: length=12; index=-1 with nothing else.


** Activity (main) Pause, UserClosed = true **
Installing file.
GC_FOR_ALLOC freed 812K, 13% free 7950K/9040K, paused 20ms, total 20ms
GC_CONCURRENT freed 24K, 8% free 8334K/9040K, paused 3ms+1ms, total 22ms
GC_FOR_ALLOC freed 733K, 13% free 7910K/9040K, paused 21ms, total 21ms
GC_CONCURRENT freed 394K, 13% free 7918K/9040K, paused 4ms+2ms, total 28ms
GC_CONCURRENT freed 418K, 13% free 7926K/9040K, paused 6ms+2ms, total 33ms
GC_CONCURRENT freed 418K, 13% free 7918K/9040K, paused 3ms+2ms, total 32ms
GC_CONCURRENT freed 386K, 13% free 7926K/9040K, paused 3ms+2ms, total 22ms
GC_CONCURRENT freed 410K, 13% free 7918K/9040K, paused 2ms+2ms, total 19ms
GC_CONCURRENT freed 410K, 13% free 7934K/9040K, paused 7ms+3ms, total 35ms
PackageAdded: package:tonk.classic
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (main) Pause, UserClosed = false **
java.lang.ArrayIndexOutOfBoundsException: length=12; index=-1
Ignoring event:
** Activity (main) Resume **
** Activity (main) Resume **
received
GC_CONCURRENT freed 415K, 13% free 7902K/8992K, paused 9ms+1ms, total 31ms
Installing file.
GC_CONCURRENT freed 411K, 8% free 7918K/8588K, paused 8ms+1ms, total 51ms
GC_FOR_ALLOC freed 273K, 8% free 7910K/8588K, paused 24ms, total 24ms
GC_FOR_ALLOC freed 265K, 8% free 7918K/8588K, paused 20ms, total 20ms
GC_FOR_ALLOC freed 273K, 8% free 7910K/8588K, paused 18ms, total 18ms
GC_FOR_ALLOC freed 273K, 8% free 7910K/8588K, paused 22ms, total 22ms
GC_FOR_ALLOC freed 273K, 8% free 7910K/8588K, paused 26ms, total 26ms
GC_FOR_ALLOC freed 273K, 8% free 7910K/8588K, paused 23ms, total 23ms
GC_FOR_ALLOC freed 273K, 8% free 7910K/8588K, paused 24ms, total 24ms
GC_FOR_ALLOC freed 265K, 8% free 7918K/8588K, paused 26ms, total 26ms
GC_FOR_ALLOC freed 273K, 8% free 7910K/8588K, paused 26ms, total 26ms
GC_FOR_ALLOC freed 273K, 8% free 7910K/8588K, paused 20ms, total 20ms
GC_FOR_ALLOC freed 273K, 8% free 7910K/8588K, paused 26ms, total 26ms
PackageAdded: package:tonk.classic
** Activity (main) Create, isFirst = true **
GC_FOR_ALLOC freed 307K, 8% free 7902K/8588K, paused 23ms, total 23ms
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
Ignoring event:
** Activity (main) Resume **
** Activity (main) Resume **
received
received
 
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eps

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Could it be something to do with Months? The length of the array is 12, seemingly in both cases, but the index has gone past that...

I haven't seen this error, but I haven't been doing that much B4A development in the past 2-3 months.

What version of B4A are people seeing this in? The latest one?
 
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KMatle

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I know that, too. It occurs very randomly when I use the rapid debugger. I have 2 real devices I switch between whe I test. The I just start compiling again. No big deal.
 
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KMatle

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Had the little "error" a few minutes ago. It's in rapid debug and when you add/change some lines to the code while the debugger is "running". Pressing the restart button then sometimes causes it.

Maybe new lines are not updated while restarting (example: before 20 and after 23. The 3 new lines are not seen yet but addressed = out of bounds)
 
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