NullRef exceptions appear when trying to create lambda expressions with IL2CPP and .NET 4.6.

Steps to reproduce:
1) Open the attached project.
2) Build & Run on iOS or Android.

A NullReferenceException is thrown:
NullReferenceException: Object reference not set to an instance of an object.
at System.Linq.Expressions.Expression.CreateLambda (System.Type delegateType, System.Linq.Expressions.Expression body, System.String name, System.Boolean tailCall, System.Collections.ObjectModel.ReadOnlyCollection`1[T] parameters) [0x00000] in <00000000000000000000000000000000>:0
at System.Linq.Expressions.Expression.Lambda[TDelegate] (System.Linq.Expressions.Expression body, System.String name, System.Boolean tailCall, System.Collections.Generic.IEnumerable`1[T] parameters) [0x00000] in <00000000000000000000000000000000>:0
at System.Linq.Expressions.Expression.Lambda[TDelegate] (System.Linq.Expressions.Expression body, System.Boolean tailCall, System.Collections.Generic.IEnumerable`1[T] parameters) [0x00000] in <00000000000000000000000000000000>:0
at System.Linq.Expressions.Expression.Lambda[TDelegate] (System.Linq.Expressions.Expression body, System.Linq.Expressions.ParameterExpression[] parameters) [0x00000] in <00000

This does not occur when using Mono2x or .NET 3.5.
Reproduces on iOS and Android.

Reproduced on:
2018.2.0a1, 2017.3.0p2, 2017.2.1p2

Did not reproduce:
2017.1.2p3, 2017.1.0a6

Devices:
iPhone 8 Plus iOS 11.2.1
Samsung Galaxy S8 Android 7.0