Random crashes due to a null pointer exception

raphaelgosteli — Mon, 05 Jul 2021 09:49:12 GMT

Hello

After upgrading to ArcGIS Runtime 100.10 we're experiencing randomly occurring crashes caused by an unhandled/undetected null point exception in ArcGIS.

The exception occurs in the RTCViewpoint.m on line 98 according to the Xcode trace:

ArcGIS`-[RTCViewpoint initWithTargetExtent:]: 0x101f4110c <+0>: stp x20, x19, [sp, #-0x20]! 0x101f41110 <+4>: stp x29, x30, [sp, #0x10] 0x101f41114 <+8>: add x29, sp, #0x10 ; =0x10 0x101f41118 <+12>: mov x19, x0 0x101f4111c <+16>: adrp x8, 16933 0x101f41120 <+20>: ldr x1, [x8, #0xe48] 0x101f41124 <+24>: mov x0, x2 0x101f41128 <+28>: bl 0x104d75fd4 ; symbol stub for: objc_msgSend 0x101f4112c <+32>: mov x1, #0x0 0x101f41130 <+36>: bl 0x102217aa0 ; RT_Viewpoint_createWithExtent -> 0x101f41134 <+40>: cbz x0, 0x101f41150 ; <+68> at RTCViewpoint.m:98:12 0x101f41138 <+44>: mov x2, x0 0x101f4113c <+48>: adrp x8, 16933 0x101f41140 <+52>: ldr x1, [x8, #0xe40] 0x101f41144 <+56>: mov x0, x19 0x101f41148 <+60>: bl 0x104d75fd4 ; symbol stub for: objc_msgSend 0x101f4114c <+64>: mov x19, x0 0x101f41150 <+68>: bl 0x104d75ff8 ; symbol stub for: objc_retain 0x101f41154 <+72>: mov x20, x0 0x101f41158 <+76>: mov x0, x19 0x101f4115c <+80>: bl 0x104d75fec ; symbol stub for: objc_release 0x101f41160 <+84>: mov x0, x20 0x101f41164 <+88>: ldp x29, x30, [sp, #0x10] 0x101f41168 <+92>: ldp x20, x19, [sp], #0x20 0x101f4116c <+96>: ret

with the following error message in the console log:

ArcGIS Runtime Error Occurred. Set a breakpoint on C++ exceptions to see the original callstack and context for this error: Error Domain=com.esri.arcgis.runtime.error Code=1 "Null pointer." UserInfo={NSLocalizedFailureReason=object cannot be null., NSLocalizedDescription=Null pointer., Additional Message=object cannot be null.}

Can anyone help me with this issue or has seen similar behaviour?

Re: Random crashes due to a null pointer exception

kris — Mon, 05 Jul 2021 13:10:08 GMT

Hi Raphael, did you try the latest (100.11.2) sdk? Also, RTCViewpoint.m - is that really ESRI's code? I´m not an ESRI dev, but usually they prefix everything with AGS 🙂

Re: Random crashes due to a null pointer exception

MarkDostal — Tue, 06 Jul 2021 13:30:49 GMT

Hello, sorry to hear you are having a problem. What is your app doing when the crash occurs? If you have sample code or a sequence of steps which reproduces the problem, that would help in determining why the "null pointer" exception happens.

I would also recommend what @kris suggests: upgrading to the latest SDK (100.11.2). (RTCViewpoint.m is our code.)

Lastly, what version of Xcode/iOS are you using when the crash occurs?

Mark

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Random crashes due to a null pointer exception

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