Step to reproduce:
1. Open user attached project
2. Make sure Scripting Backend is set as IL2CPP
3. Deploy to device

ArgumentException: Object of type 'Il2CppCompilerBug+BoxedInt' cannot be converted to type 'System.Int32'.
Parameter name: value
at System.Action`3[T1,T2,T3].Invoke (.T1 arg1, .T2 arg2, .T3 arg3) [0x00000] in <filename unknown>:0
at Il2CppCompilerBug.SetPrivateIntValueOfClassWithoutBoxing (Int32 _newValue) [0x00000] in <filename unknown>:0

(Filename: currently not available on il2cpp Line: -1)

Reproduced on: 2017.3.1p1, 2018.1.0b7

Reproduced on:
iPad 3 (iOS 9.3.5)
Samsung SM G950U, OS:7.0, CPU:arm64-v8a, GPU:Adreno (TM) 540, Build:samsung/dreamqltesq/dreamqltesq:7.0/NRD90M/G950USQU1AQC8:user/release-keys
Samsung SM N950F, OS:7.1.1, CPU:arm64-v8a, GPU:Mali-G71, Build:samsung/greatltexx/greatlte:7.1.1/NMF26X/N950FXXU2BQKG:user/release-keys
Xiaomi MI 5*, OS:7.0, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:Xiaomi/gemini/gemini:6.0.1/MXB48T/V8.0.12.0.MAACNDI:user/release-keys