Reproduction steps:
1. Open the attached '1013854_project' project.
2. Build the 'Test' scene to a device (tested using iOS, but it should be reproducible with any IL2CPP platform).
3. Check the console.

IL2CPP .NET 4.x
Attempting to call method 'System.Linq.Enumerable+WhereSelectEnumerableIterator`2<NewBehaviourScript+B`1[[System.Object, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]], NewBehaviourScript+B`1[[System.Object, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]>::Select<NewBehaviourScript+B`1[[System.Object, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]>' for which no ahead of time (AOT) code was generated.

Reproduced with:
- .NET 4.x
- 2017.2.2p1, 2017.3.2f1, 2018.1.0b11, 2018.2.0a5
- Checked and unchecked 'Strip Engine Code'

Not reproducible with:
- .NET 3.5

Note:
Log attached to the edit.