Optional members in requests may be wrong

[aignas]

I am trying to get the omnisharp-roslyn working with LanguageClient-neovim. However it fails with the following output in the neovim client when opening a simple Console "Hello, World!" application.

The log:

2018-02-15T23:43:35.585074+02:00 INFO languageclient::languageclient - => {"jsonrpc":"2.0","method":"initialize","params":{"capabilities":{"textDocument":{"completion":{"completionItem":{"commitCharactersSupport":null,"documentationFormat":null,"snippetSupport":false},"dynamicRegistration":null}}},"initializationOptions":null,"processId":22098,"rootPath":"/home/ia/src/learning/katas/dotnet/new","rootUri":"file:///home/ia/src/learning/katas/dotnet/new","trace":"off"},"id":8}
2018-02-15T23:43:35.832694401+02:00 DEBUG languageclient::languageclient - state.child_ids.cs: 22107 ==> null
2018-02-15T23:43:35.832728994+02:00 DEBUG languageclient::languageclient - state.last_cursor_line: 6 ==> 0
2018-02-15T23:43:35.832880155+02:00 DEBUG languageclient::languageclient - state.roots.cs: "/home/ia/src/learning/katas/dotnet/new" ==> null
2018-02-15T23:43:35.833135189+02:00 DEBUG languageclient::languageclient - state.id: 8 ==> 9
2018-02-15T23:43:35.833279934+02:00 INFO languageclient::languageclient - => {"jsonrpc":"2.0","method":"eval","params":["exists('#User#LanguageClientStopped')"],"id":9}
2018-02-15T23:43:35.834121589+02:00 INFO languageclient::languageclient - <= {"id":9,"jsonrpc":"2.0","result":0}
2018-02-15T23:43:35.834694421+02:00 INFO languageclient::languageclient - => {"jsonrpc":"2.0","method":"execute","params":["let g:LanguageClient_serverStatus=0"]}
2018-02-15T23:43:35.834745034+02:00 INFO languageclient::languageclient - => {"jsonrpc":"2.0","method":"execute","params":["let g:LanguageClient_serverStatusMessage=''"]}
2018-02-15T23:43:35.834970470+02:00 INFO languageclient::languageclient - => {"jsonrpc":"2.0","method":"execute","params":["echohl Error | echomsg 'Language server (cs) exited unexpectedly!\n\nlanguage server stderr:\n\n\nUnhandled Exception:\nNewtonsoft.Json.JsonSerializationException: Error converting value {null} to type ''System.Boolean''. Path ''params.capabilities.textDocument.completion.dynamicRegistration'', line 1, position 221. ---> System.InvalidCastException: Null object cannot be converted to a value type.\n  at System.Convert.ChangeType (System.Object value, System.Type conversionType, System.IFormatProvider provider) [0x00029] in <86946becea244f64b084ee9718b6e104>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType (Newtonsoft.Json.JsonReader reader, System.Object value, System.Globalization.CultureInfo culture, Newtonsoft.Json.Serialization.JsonContract contract, System.Type targetType) [0x000aa] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n   --- End of inner exception stack trace ---\n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType (Newtonsoft.Json.JsonReader reader, System.Object value, System.Globalization.CultureInfo culture, Newtonsoft.Json.Serialization.JsonContract contract, System.Type targetType) [0x000eb] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00125] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x00061] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00268] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00161] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000db] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerProxy.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00008] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at OmniSharp.Extensions.LanguageServer.Converters.SupportsConverter.ReadJson (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue, Newtonsoft.Json.JsonSerializer serializer) [0x0006b] in <43976da1155b4e5492c57f3d85e24f0e>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable (Newtonsoft.Json.JsonConverter converter, Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue) [0x00055] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x0004e] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00268] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00161] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x00061] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00268] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00161] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x00061] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00268] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00161] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000db] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00053] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Linq.JToken.ToObject (System.Type objectType, Newtonsoft.Json.JsonSerializer jsonSerializer) [0x00012] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Linq.JToken.ToObject (System.Type objectType) [0x002ff] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at OmniSharp.Extensions.LanguageServer.LspRequestRouter.FindDescriptor (System.String method, Newtonsoft.Json.Linq.JToken params) [0x000bd] in <43976da1155b4e5492c57f3d85e24f0e>:0 \n  at OmniSharp.Extensions.LanguageServer.LspRequestRouter.FindDescriptor (OmniSharp.Extensions.JsonRpc.Server.IMethodWithParams instance) [0x0000d] in <43976da1155b4e5492c57f3d85e24f0e>:0 \n  at OmniSharp.Extensions.LanguageServer.LspRequestRouter.GetDescriptor (OmniSharp.Extensions.JsonRpc.Server.Request request) [0x00000] in <43976da1155b4e5492c57f3d85e24f0e>:0 \n  at OmniSharp.Extensions.JsonRpc.InputHandler.HandleRequest (System.String request) [0x001d5] in <40a471d951bc47f4b355e2166a681afc>:0 \n  at OmniSharp.Extensions.JsonRpc.InputHandler.ProcessInputStream () [0x00126] in <40a471d951bc47f4b355e2166a681afc>:0 \n  at System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) [0x00014] in <86946becea244f64b084ee9718b6e104>:0 \n  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00071] in <86946becea244f64b084ee9718b6e104>:0 \n  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <86946becea244f64b084ee9718b6e104>:0 \n  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) [0x0002b] in <86946becea244f64b084ee9718b6e104>:0 \n  at System.Threading.ThreadHelper.ThreadStart () [0x00008] in <86946becea244f64b084ee9718b6e104>:0 \n[ERROR] FATAL UNHANDLED EXCEPTION: Newtonsoft.Json.JsonSerializationException: Error converting value {null} to type ''System.Boolean''. Path ''params.capabilities.textDocument.completion.dynamicRegistration'', line 1, position 221. ---> System.InvalidCastException: Null object cannot be converted to a value type.\n  at System.Convert.ChangeType (System.Object value, System.Type conversionType, System.IFormatProvider provider) [0x00029] in <86946becea244f64b084ee9718b6e104>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType (Newtonsoft.Json.JsonReader reader, System.Object value, System.Globalization.CultureInfo culture, Newtonsoft.Json.Serialization.JsonContract contract, System.Type targetType) [0x000aa] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n   --- End of inner exception stack trace ---\n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType (Newtonsoft.Json.JsonReader reader, System.Object value, System.Globalization.CultureInfo culture, Newtonsoft.Json.Serialization.JsonContract contract, System.Type targetType) [0x000eb] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00125] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x00061] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00268] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00161] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000db] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerProxy.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00008] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at OmniSharp.Extensions.LanguageServer.Converters.SupportsConverter.ReadJson (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue, Newtonsoft.Json.JsonSerializer serializer) [0x0006b] in <43976da1155b4e5492c57f3d85e24f0e>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable (Newtonsoft.Json.JsonConverter converter, Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue) [0x00055] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x0004e] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00268] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00161] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x00061] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00268] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00161] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x00061] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00268] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00161] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000db] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00053] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Linq.JToken.ToObject (System.Type objectType, Newtonsoft.Json.JsonSerializer jsonSerializer) [0x00012] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at Newtonsoft.Json.Linq.JToken.ToObject (System.Type objectType) [0x002ff] in <dc86da7fc46c487ba6c7ab826da479cc>:0 \n  at OmniSharp.Extensions.LanguageServer.LspRequestRouter.FindDescriptor (System.String method, Newtonsoft.Json.Linq.JToken params) [0x000bd] in <43976da1155b4e5492c57f3d85e24f0e>:0 \n  at OmniSharp.Extensions.LanguageServer.LspRequestRouter.FindDescriptor (OmniSharp.Extensions.JsonRpc.Server.IMethodWithParams instance) [0x0000d] in <43976da1155b4e5492c57f3d85e24f0e>:0 \n  at OmniSharp.Extensions.LanguageServer.LspRequestRouter.GetDescriptor (OmniSharp.Extensions.JsonRpc.Server.Request request) [0x00000] in <43976da1155b4e5492c57f3d85e24f0e>:0 \n  at OmniSharp.Extensions.JsonRpc.InputHandler.HandleRequest (System.String request) [0x001d5] in <40a471d951bc47f4b355e2166a681afc>:0 \n  at OmniSharp.Extensions.JsonRpc.InputHandler.ProcessInputStream () [0x00126] in <40a471d951bc47f4b355e2166a681afc>:0 \n  at System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) [0x00014] in <86946becea244f64b084ee9718b6e104>:0 \n  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00071] in <86946becea244f64b084ee9718b6e104>:0 \n  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <86946becea244f64b084ee9718b6e104>:0 \n  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) [0x0002b] in <86946becea244f64b084ee9718b6e104>:0 \n  at System.Threading.ThreadHelper.ThreadStart () [0x00008] in <86946becea244f64b084ee9718b6e104>:0 \n' | echohl None"]}
2018-02-15T23:43:35.835109325+02:00 ERROR languageclient::languageclient - RPC-cs thread error: Language server (cs) exited unexpectedly!

To my understanding the dynamicRegistration is optional as per the specification. However, the API defined in this project expects a boolean value. The Spec shows that it is an optional boolean value, but it does not clearly state whether it should be a boolean or a nullable boolean.

[david-driscoll]

Will fix to allow null as a value for these fields.

[david-driscoll]

I feel like this has been fixed with the latest version (OmniSharp isn't using it just yet).

[david-driscoll]

I was wrong... I found the code hiding on another machine. Should be in the next release however!