EXC_BAD_ACCESS when XRCpuImage.Dispose() at iOS

Unity Engine
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1

I check valid property of XRCpuImage and try to make XRCpuImage.Dispose() if valid is true.
But sometimes i have crash, only at iOS.

Stacktrace:

0   UnityFramework   0x000000010a9bef60 std::__1::__hash_table<std::__1::__hash_value_type<CameraImageApi::Handle<int, CameraImageApi::Image>, CameraImageApi::Image const*>, std::__1::__unordered_map_hasher<CameraImageApi::Handle<int, Ca... + 72 (__hash_table:2569)
1   UnityFramework   0x000000010a9beef4 std::__1::__hash_table<std::__1::__hash_value_type<CameraImageApi::Handle<int, CameraImageApi::Image>, CameraImageApi::Image const*>, std::__1::__unordered_map_hasher<CameraImageApi::Handle<int, Ca... + 28 (__hash_table:2498)
2   UnityFramework   0x000000010a9be424 std::__1::unordered_map<CameraImageApi::Handle<int, CameraImageApi::Image>, CameraImageApi::Image const*, std::__1::hash<CameraImageApi::Handle<int, CameraImageApi::Image> >, std::__1::equal_to<Cam... + 12 (unordered_map:1270)
3   UnityFramework   0x000000010a9be424 CameraImageApi::ImageManager::smile:ispose(CameraImageApi::Handle<int, CameraImageApi::Image>) + 88 (ImageManager.cpp:90)
4   UnityFramework   0x000000010ba88628 VirtualActionInvoker1<int>::Invoke(unsigned short, Il2CppObject*, int) + 12 (Unity.XR.ARSubsystems.cpp:31)
5   UnityFramework   0x000000010ba88628 XRCpuImage_Dispose_m80B8CA56700DD5EB8A5613AA42F6F389D86A746B + 48 (Unity.XR.ARSubsystems.cpp:16786)
6   UnityFramework   0x000000010aa181c0 ObjectDetection_ThreadedWorkYUV420ToNative_m811E1555DD154DDAD6F72C913E6F92B13F840D75 + 764 (Assembly-CSharp.cpp:24195)

Last row is exactly my XRCpuImage.Dispose()

More info from xcode:

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Codes: 0x0000000000000001, 0x0000000000000000
VM Region Info: 0 is not in any region.  Bytes before following region: 4298096640
REGION TYPE     START - END     [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
UNUSED SPACE AT START
--->
__TEXT     1002fc000-1003a4000 [  672K] r-x/r-x SM=COW  ...ht.app/Foo
Exception Note:  EXC_CORPSE_NOTIFY
Termination Reason: SIGNAL 11 Segmentation fault: 11
Terminating Process: exc handler [6309]

As i understand, it’s problem with attempt to get this image from memory by c++ code. Is it a my problem or ar package’s bug? What can i do for fixing this problem?

2

Without showing us your code, it’s impossible for us to determine whether your code is misusing the API in any way.

We have sample code here for reference: Image capture | AR Foundation | 6.0.2