Spontaneous removal of objects from the scene

Unity Engine
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1

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Unloading 0 Unused Serialized files (Serialized files now loaded: 0)
UnloadTime: 4.742833 ms
NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.CSharp.RuntimeBinder.Semantics.ExpressionTreeRewriter.VisitBoundLambda (Microsoft.CSharp.RuntimeBinder.Semantics.ExprBoundLambda anonmeth) [0x00000] in <00000000000000000000000000000000>:0
at Microsoft.CSharp.RuntimeBinder.RuntimeBinder.BindCore (Microsoft.CSharp.RuntimeBinder.ICSharpBinder payload, System.Linq.Expressions.Expression parameters, System.Dynamic.DynamicMetaObject args, System.Dynamic.DynamicMetaObject& deferredBinding) [0x00000] in <00000000000000000000000000000000>:0
at Microsoft.CSharp.RuntimeBinder.RuntimeBinder.Bind (Microsoft.CSharp.RuntimeBinder.ICSharpBinder payload, System.Linq.Expressions.Expression parameters, System.Dynamic.DynamicMetaObject args, System.Dynamic.DynamicMetaObject& deferredBinding) [0x00000] in <00000000000000000000000000000000>:0
at Microsoft.CSharp.RuntimeBinder.BinderHelper.Bind (Microsoft.CSharp.RuntimeBinder.ICSharpBinder action, Microsoft.CSharp.RuntimeBinder.RuntimeBinder binder, System.Dynamic.DynamicMetaObject args, System.Collections.Generic.IEnumerable1[T] arginfos, System.Dynamic.DynamicMetaObject onBindingError) [0x00000] in <00000000000000000000000000000000>:0 at System.Dynamic.DynamicMetaObjectBinder.Bind (System.Object[] args, System.Collections.ObjectModel.ReadOnlyCollection1[T] parameters, System.Linq.Expressions.LabelTarget returnLabel) [0x00000] in <00000000000000000000000000000000>:0
at System.Runtime.CompilerServices.CallSiteBinder.BindCore[T] (System.Runtime.CompilerServices.CallSite1[T] site, System.Object[] args) [0x00000] in <00000000000000000000000000000000>:0 at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <00000000000000000000000000000000>:0 at System.Linq.Expressions.Interpreter.MethodInfoCallInstruction.Run (System.Linq.Expressions.Interpreter.InterpretedFrame frame) [0x00000] in <00000000000000000000000000000000>:0 at System.Linq.Expressions.Interpreter.Interpreter.Run (System.Linq.Expressions.Interpreter.InterpretedFrame frame) [0x00000] in <00000000000000000000000000000000>:0 at System.Linq.Expressions.Interpreter.LightLambda.RunVoid3[T0,T1,T2] (T0 arg0, T1 arg1, T2 arg2) [0x00000] in <00000000000000000000000000000000>:0 at ShopItemViewFactory.Get (ShopItem shopItem, UnityEngine.Transform parent) [0x00000] in <00000000000000000000000000000000>:0 at ShopPanel.Show (System.Collections.Generic.IEnumerable1[T] items) [0x00000] in <00000000000000000000000000000000>:0
— End of stack trace from previous location where exception was thrown —

at System.Linq.Expressions.Interpreter.MethodInfoCallInstruction.Run (System.Linq.Expressions.Interpreter.InterpretedFrame frame) [0x00000] in <00000000000000000000000000000000>:0
at System.Linq.Expressions.Interpreter.Interpreter.Run (System.Linq.Expressions.Interpreter.InterpretedFrame frame) [0x00000] in <00000000000000000000000000000000>:0
at System.Linq.Expressions.Interpreter.LightLambda.RunVoid3[T0,T1,T2] (T0 arg0, T1 arg1, T2 arg2) [0x00000] in <00000000000000000000000000000000>:0
at ShopItemViewFactory.Get (ShopItem shopItem, UnityEngine.Transform parent) [0x00000] in <00000000000000000000000000000000>:0
at ShopPanel.Show (System.Collections.Generic.IEnumerable`1[T] items) [0x00000] in <00000000000000000000000000000000>:0

Unloading 2 unused Assets to reduce memory usage. Loaded Objects now: 8328.
Total: 4.829834 ms (FindLiveObjects: 0.916917 ms CreateObjectMapping: 0.466750 ms MarkObjects: 3.387084 ms DeleteObjects: 0.058375 ms)
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This problem only occurs when building the game on iPhone, on PC everything works fine

2

This smells a little bit like code stripping.

I say that because the stack starts with your ShopPanel and goes into the ShopItemViewFactory, hits a Linq expression and starts doing some reflection and then blows up trying to (I think) bind some method in.

3

But why all works on PC? Can be some problem with build setting in unity for Ios?

4

Hey!

Have you tried switching PC to IL2CPP to see if it then also has the issue? (IL2CPP is the scripting backend on iOS)