IL bug on Mono with 3.0.0-beta2

[MariusVolkhart]

When performing a FindOne query on a non-empty LiteCollection<BsonDocument> using the Mono runtime, a IL error occurs.

Steps to reproduce

1. Insert a new BsonDocument into a LiteCollection<BsonDocument>
2. Call the FindOne method on this collection. The returned value does not need to be used.

Expected behavior

I expect to obtain a BsonDocument matching the query parameters I provide

Observed behavior

Unhandled Exception:
System.InvalidProgramException: Invalid IL code in (wrapper dynamic-method) object:lambda_method (System.Runtime.CompilerServices.Closure,object): IL_0006: callvirt  0x00000003


  at (wrapper managed-to-native) System.Delegate:CreateDelegate_internal (System.Type,object,System.Reflection.MethodInfo,bool)
  at System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method, System.Boolean throwOnBindFailure, System.Boolean allowClosed) [0x00357] in <dca3b561b8ad4f9fb10141d81b39ff45>:0 
  at System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method) [0x00000] in <dca3b561b8ad4f9fb10141d81b39ff45>:0 
  at System.Reflection.Emit.DynamicMethod.CreateDelegate (System.Type delegateType, System.Object target) [0x0001d] in <dca3b561b8ad4f9fb10141d81b39ff45>:0 
  at System.Linq.Expressions.Compiler.LambdaCompiler.CreateDelegate () [0x00022] in <63992662b765477a898ef49cdcc99ee2>:0 
  at System.Linq.Expressions.Compiler.LambdaCompiler.Compile (System.Linq.Expressions.LambdaExpression lambda, System.Runtime.CompilerServices.DebugInfoGenerator debugInfoGenerator) [0x0001d] in <63992662b765477a898ef49cdcc99ee2>:0 
  at System.Linq.Expressions.Expression`1[TDelegate].Compile () [0x00000] in <63992662b765477a898ef49cdcc99ee2>:0 
  at LiteDB.Reflection.CreateGenericGetter (System.Type type, System.Reflection.MemberInfo memberInfo) [0x00053] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at LiteDB.BsonMapper.BuildEntityMapper (System.Type type) [0x00104] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at LiteDB.BsonMapper.GetEntityMapper (System.Type type) [0x0002d] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at LiteDB.LiteCollection`1[T].EnsureIndex (LiteDB.IndexNotFoundException ex) [0x0000d] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at LiteDB.LiteCollection`1+<Find>d__17[T].MoveNext () [0x00093] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at System.Linq.Enumerable.FirstOrDefault[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0003e] in <63992662b765477a898ef49cdcc99ee2>:0 
  at LiteDB.LiteCollection`1[T].FindOne (LiteDB.Query query) [0x0000d] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at ConsoleApplication.Program.Main (System.String[] args) [0x00055] in <40af54cb23eb4b8b9b2b84598012a334>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.InvalidProgramException: Invalid IL code in (wrapper dynamic-method) object:lambda_method (System.Runtime.CompilerServices.Closure,object): IL_0006: callvirt  0x00000003


  at (wrapper managed-to-native) System.Delegate:CreateDelegate_internal (System.Type,object,System.Reflection.MethodInfo,bool)
  at System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method, System.Boolean throwOnBindFailure, System.Boolean allowClosed) [0x00357] in <dca3b561b8ad4f9fb10141d81b39ff45>:0 
  at System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method) [0x00000] in <dca3b561b8ad4f9fb10141d81b39ff45>:0 
  at System.Reflection.Emit.DynamicMethod.CreateDelegate (System.Type delegateType, System.Object target) [0x0001d] in <dca3b561b8ad4f9fb10141d81b39ff45>:0 
  at System.Linq.Expressions.Compiler.LambdaCompiler.CreateDelegate () [0x00022] in <63992662b765477a898ef49cdcc99ee2>:0 
  at System.Linq.Expressions.Compiler.LambdaCompiler.Compile (System.Linq.Expressions.LambdaExpression lambda, System.Runtime.CompilerServices.DebugInfoGenerator debugInfoGenerator) [0x0001d] in <63992662b765477a898ef49cdcc99ee2>:0 
  at System.Linq.Expressions.Expression`1[TDelegate].Compile () [0x00000] in <63992662b765477a898ef49cdcc99ee2>:0 
  at LiteDB.Reflection.CreateGenericGetter (System.Type type, System.Reflection.MemberInfo memberInfo) [0x00053] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at LiteDB.BsonMapper.BuildEntityMapper (System.Type type) [0x00104] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at LiteDB.BsonMapper.GetEntityMapper (System.Type type) [0x0002d] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at LiteDB.LiteCollection`1[T].EnsureIndex (LiteDB.IndexNotFoundException ex) [0x0000d] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at LiteDB.LiteCollection`1+<Find>d__17[T].MoveNext () [0x00093] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at System.Linq.Enumerable.FirstOrDefault[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0003e] in <63992662b765477a898ef49cdcc99ee2>:0 
  at LiteDB.LiteCollection`1[T].FindOne (LiteDB.Query query) [0x0000d] in <cf7d51444a0a4bc5ad81388232b575c4>:0 
  at ConsoleApplication.Program.Main (System.String[] args) [0x00055] in <40af54cb23eb4b8b9b2b84598012a334>:0

Environment

Mono version: 4.6.1.5
OSX 10.11.6 "El Capitan"

Additional information

This bug is not observed on a Windows 10 machine with CLR v4.0.30319.

[MariusVolkhart]

A minimal program to replicate the issue is available at https://github.com/MariusVolkhart/LiteDbIssue351Sample

[mbdavid]

I guess the problem is when LiteDB try auto create index in Name field when using BsonDocument. Try use EnsureIndex before FindOne. I will fix it

[mbdavid]

If problem persist, please re-open issue