iOS Question EXC_CRASH (SIGABRT) or EXC_BAD_ACCESS

[Filippo]

Hi,

I currently have several customers sending the same crash report.
Of course I can't reproduce these errors with my devices, so I don't know where the error is.
Can anyone do anything with this crash report?

Many thanks in advance

 

[Erel]

1. All of these come from iPads. Make sure to test your app on one.
2. Integrate KSCrash. It will help with such crashes.
3. Symbolicating the crash report: https://www.b4x.com/android/forum/threads/symbolicating-a-crash-report.69145/#content
4.

The logs here do include some useful information:
17 MoR 0x000000010436ef58 0x104214000 + 1421144 (-[B4IPanelWrapper AddView:::::] + 136)
18 MoR 0x00000001042ff7d4 0x104214000 + 964564 ( + 5504)
19 MoR 0x00000001042f8628 0x104214000 + 935464 ( + 1828)
20 MoR 0x000000010435bd78 0x104214000 + 1342840 (__21-[B4ICommon Sleep:::]_block_invoke + 48)

Look for a code that calls Sleep and then adds a view. Maybe you are adding an uninitialized view at this point.

 

[Filippo]

Thanks Erel, I'll try my best.

 

[Filippo]

Hi Erel,

I think I have found the error.
The error happens when displaying "ShowProgressBar".
I added the variable "ClvIndex" according to your advice some time ago, and it all worked without problems until now.

Here is my code:

Private Sub FillCronoTimer(Timerlist As List, IsListChanged As Boolean)
    Dim racetime1 As RaceProperty
    Dim pnl As Panel
    
    ClvIndex = ClvIndex + 1 'global int variable
    Dim MyIndex As Int = ClvIndex
    
    scvCronoTimer.Panel.Height = 0
    scvCronoTimer.Panel.RemoveAllViews

    ShowProgressBar(True, 0)
        
    For i = 0 To Timerlist.Size -1
        racetime1 = Timerlist.get(i)

        ...

        AddCronoTimer(racetime1,False)
        
        If Timerlist.Size > 10 And (i Mod 4) = 0 Then
            ShowProgressBar(True, i / Timerlist.Size)
            Sleep(0)
        End If

        If MyIndex <> ClvIndex Then Return
    Next

    ColorAllPanel
    
    For i = 0 To scvCronoTimer.Panel.NumberOfViews - 1
        pnl = scvCronoTimer.Panel.GetView(i)

        Racetime = pnl.Tag
        If Racetime.Visible Then
            Dim tbtn As fsToggleButton = pnl.GetView(13).Tag
            tbtn.Checked = Racetime.Checked
        End If
    Next

    'Keine Änderung bis jetzt
    Starter.IsListCronoTimerChanged = IsListChanged
    
    ShowProgressBar(False, 0)
End Sub

#Region ProgressBar
Private Sub ShowProgressBar(Visible As Boolean, Value As Double)
    pnlProgressBar.BringToFront
    pnlProgressBar.Visible = Visible
    lblProgress.Width = Value * (ProgressBar.Width - 2dip)
End Sub

Private Sub pnlProgressBar_Click
    'Platzhalter
End Sub
#End Region

What do you think, should I remove "ShowProgressBar" or do you have another tip?

 

[Erel]

I added the variable "ClvIndex" according to your advice some time ago

[B4X] Resumable subs and the index pattern

My guess is that the error still happens when this sub is called multiple times.
Do something different:

Private Sub FillCronoTimer(Timerlist As List, IsListChanged As Boolean)
 If FillCronoTimerRunning Then Return
 FillCronoTimerRunning = True
..


FillCronoTimerRunning = False
End Sub

 

[Filippo]

[B4X] Resumable subs and the index pattern

My guess is that the error still happens when this sub is called multiple times.
Do something different:

Private Sub FillCronoTimer(Timerlist As List, IsListChanged As Boolean)
 If FillCronoTimerRunning Then Return
 FillCronoTimerRunning = True
..


FillCronoTimerRunning = False
End Sub

Hello Erel,
Thanks for the tip.
It sounds logical, I will try it.