Stephen Mallette created TINKERPOP-2377:
-------------------------------------------

             Summary: Investigate intermittent .NET GLV test failures 
                 Key: TINKERPOP-2377
                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2377
             Project: TinkerPop
          Issue Type: Improvement
          Components: dotnet
    Affects Versions: 3.4.6
            Reporter: Stephen Mallette


Travis builds of .NET seem instable. Some of that instability is out of our 
control and bound to the travis environment but I've noticed at least one odd 
pattern of failure around these tests:

{code}
Failures and skipped scenarios:
1) g_V_constantXnullX: Failed
System.Reflection.TargetInvocationException: Exception has been thrown by the 
target of an invocation.
 ---> System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& 
value)
   at Gremlin.Net.Process.Traversal.Bindings.GetBoundVariable[TV](TV value) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bindings.cs:line
 66
   at Gremlin.Net.Process.Traversal.Bytecode.ConvertArgument(Object argument, 
Boolean searchBindings) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 113
   at Gremlin.Net.Process.Traversal.Bytecode.FlattenArguments(Object[] 
arguments) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 105
   at Gremlin.Net.Process.Traversal.Bytecode.AddStep(String stepName, Object[] 
args) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 88
   at Gremlin.Net.Process.Traversal.GraphTraversal`2.Constant[E2](E2 e) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/GraphTraversal.cs:line
 428
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] 
arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags 
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversalFromTokens(IList`1
 tokens, GraphTraversalSource g, IDictionary`2 contextParameterValues, String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 78
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversal(String
 traversalText, GraphTraversalSource g, IDictionary`2 contextParameterValues) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 69
   at Gremlin.Net.IntegrationTest.Gherkin.CommonSteps.TranslateTraversal(String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/CommonSteps.cs:line
 108
2) g_V_outE_propertyXweight_nullX: Failed
System.Reflection.TargetInvocationException: Exception has been thrown by the 
target of an invocation.
 ---> System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& 
value)
   at Gremlin.Net.Process.Traversal.Bindings.GetBoundVariable[TV](TV value) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bindings.cs:line
 66
   at Gremlin.Net.Process.Traversal.Bytecode.ConvertArgument(Object argument, 
Boolean searchBindings) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 113
   at Gremlin.Net.Process.Traversal.Bytecode.FlattenArguments(Object[] 
arguments) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 105
   at Gremlin.Net.Process.Traversal.Bytecode.AddStep(String stepName, Object[] 
args) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 88
   at Gremlin.Net.Process.Traversal.GraphTraversal`2.Property(Object key, 
Object value, Object[] keyValues) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/GraphTraversal.cs:line
 1265
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] 
arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags 
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversalFromTokens(IList`1
 tokens, GraphTraversalSource g, IDictionary`2 contextParameterValues, String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 78
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversal(String
 traversalText, GraphTraversalSource g, IDictionary`2 contextParameterValues) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 69
   at Gremlin.Net.IntegrationTest.Gherkin.CommonSteps.TranslateTraversal(String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/CommonSteps.cs:line
 108
3) g_V_mapXconstantXnullXX: Failed
System.Reflection.TargetInvocationException: Exception has been thrown by the 
target of an invocation.
 ---> System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& 
value)
   at Gremlin.Net.Process.Traversal.Bindings.GetBoundVariable[TV](TV value) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bindings.cs:line
 66
   at Gremlin.Net.Process.Traversal.Bytecode.ConvertArgument(Object argument, 
Boolean searchBindings) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 113
   at Gremlin.Net.Process.Traversal.Bytecode.FlattenArguments(Object[] 
arguments) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 105
   at Gremlin.Net.Process.Traversal.Bytecode.AddStep(String stepName, Object[] 
args) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 88
   at Gremlin.Net.Process.Traversal.GraphTraversal`2.Constant[E2](E2 e) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/GraphTraversal.cs:line
 428
   at Gremlin.Net.Process.Traversal.__.Constant[E2](E2 a) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/__.cs:line
 278
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] 
arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags 
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversalFromTokens(IList`1
 tokens, GraphTraversalSource g, IDictionary`2 contextParameterValues, String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 78
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.StaticTraversalParameter.GetValue()
 in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/StaticTraversalParameter.cs:line
 64
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.BuildParameters(MethodInfo
 method, Token token, IDictionary`2& genericParameterTypes) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 247
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversalFromTokens(IList`1
 tokens, GraphTraversalSource g, IDictionary`2 contextParameterValues, String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 78
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversal(String
 traversalText, GraphTraversalSource g, IDictionary`2 contextParameterValues) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 69
   at Gremlin.Net.IntegrationTest.Gherkin.CommonSteps.TranslateTraversal(String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/CommonSteps.cs:line
 108
4) g_V_hasLabelXpersonX_propertyXname_nullX: Failed
System.Reflection.TargetInvocationException: Exception has been thrown by the 
target of an invocation.
 ---> System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& 
value)
   at Gremlin.Net.Process.Traversal.Bindings.GetBoundVariable[TV](TV value) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bindings.cs:line
 66
   at Gremlin.Net.Process.Traversal.Bytecode.ConvertArgument(Object argument, 
Boolean searchBindings) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 113
   at Gremlin.Net.Process.Traversal.Bytecode.FlattenArguments(Object[] 
arguments) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 105
   at Gremlin.Net.Process.Traversal.Bytecode.AddStep(String stepName, Object[] 
args) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 88
   at Gremlin.Net.Process.Traversal.GraphTraversal`2.Property(Object key, 
Object value, Object[] keyValues) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/GraphTraversal.cs:line
 1265
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] 
arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags 
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversalFromTokens(IList`1
 tokens, GraphTraversalSource g, IDictionary`2 contextParameterValues, String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 78
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversal(String
 traversalText, GraphTraversalSource g, IDictionary`2 contextParameterValues) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 69
   at Gremlin.Net.IntegrationTest.Gherkin.CommonSteps.TranslateTraversal(String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/CommonSteps.cs:line
 108
5) g_addVXnullX_propertyXid_nullX: Failed
System.Reflection.TargetInvocationException: Exception has been thrown by the 
target of an invocation.
 ---> System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& 
value)
   at Gremlin.Net.Process.Traversal.Bindings.GetBoundVariable[TV](TV value) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bindings.cs:line
 66
   at Gremlin.Net.Process.Traversal.Bytecode.ConvertArgument(Object argument, 
Boolean searchBindings) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 113
   at Gremlin.Net.Process.Traversal.Bytecode.FlattenArguments(Object[] 
arguments) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 105
   at Gremlin.Net.Process.Traversal.Bytecode.AddStep(String stepName, Object[] 
args) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 88
   at Gremlin.Net.Process.Traversal.GraphTraversalSource.AddV(ITraversal 
vertexLabelTraversal) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/GraphTraversalSource.cs:line
 337
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] 
arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags 
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversalFromTokens(IList`1
 tokens, GraphTraversalSource g, IDictionary`2 contextParameterValues, String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 78
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversal(String
 traversalText, GraphTraversalSource g, IDictionary`2 contextParameterValues) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 69
   at Gremlin.Net.IntegrationTest.Gherkin.CommonSteps.TranslateTraversal(String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/CommonSteps.cs:line
 108
6) g_V_group_byXageX: Scenario ignored
7) g_injectXnull_1_3_nullX: Failed
System.Reflection.TargetInvocationException: Exception has been thrown by the 
target of an invocation.
 ---> System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& 
value)
   at Gremlin.Net.Process.Traversal.Bindings.GetBoundVariable[TV](TV value) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bindings.cs:line
 66
   at Gremlin.Net.Process.Traversal.Bytecode.ConvertArgument(Object argument, 
Boolean searchBindings) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 113
   at Gremlin.Net.Process.Traversal.Bytecode.FlattenArguments(Object[] 
arguments) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 105
   at Gremlin.Net.Process.Traversal.Bytecode.AddStep(String stepName, Object[] 
args) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 88
   at Gremlin.Net.Process.Traversal.GraphTraversalSource.Inject[S](S[] starts) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/GraphTraversalSource.cs:line
 350
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] 
arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags 
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversalFromTokens(IList`1
 tokens, GraphTraversalSource g, IDictionary`2 contextParameterValues, String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 78
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversal(String
 traversalText, GraphTraversalSource g, IDictionary`2 contextParameterValues) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 69
   at Gremlin.Net.IntegrationTest.Gherkin.CommonSteps.TranslateTraversal(String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/CommonSteps.cs:line
 108
8) 
g_injectX10_20_null_20_10_10X_groupCountXxX_dedup_asXyX_projectXa_bX_by_byXselectXxX_selectXselectXyXXX:
 Failed
System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& 
value)
   at Gremlin.Net.Process.Traversal.Bindings.GetBoundVariable[TV](TV value) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bindings.cs:line
 66
   at Gremlin.Net.Process.Traversal.Bytecode.ConvertArgument(Object argument, 
Boolean searchBindings) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 113
   at Gremlin.Net.Process.Traversal.Bytecode.FlattenArguments(Object[] 
arguments) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 105
   at Gremlin.Net.Process.Traversal.Bytecode.AddStep(String stepName, Object[] 
args) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 88
   at Gremlin.Net.Process.Traversal.GraphTraversalSource.Inject[S](S[] starts) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/GraphTraversalSource.cs:line
 350
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.<>c.<.cctor>b__23_1(GraphTraversalSource
 g) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 41
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversal(String
 traversalText, GraphTraversalSource g, IDictionary`2 contextParameterValues) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 69
   at Gremlin.Net.IntegrationTest.Gherkin.CommonSteps.TranslateTraversal(String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/CommonSteps.cs:line
 108
9) g_injectXname_marko_age_nullX_selectXname_ageX: Failed
System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& 
value)
   at Gremlin.Net.Process.Traversal.Bindings.GetBoundVariable[TV](TV value) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bindings.cs:line
 66
   at Gremlin.Net.Process.Traversal.Bytecode.ConvertArgument(Object argument, 
Boolean searchBindings) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 113
   at Gremlin.Net.Process.Traversal.Bytecode.ConvertArgument(Object argument, 
Boolean searchBindings) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 128
   at Gremlin.Net.Process.Traversal.Bytecode.FlattenArguments(Object[] 
arguments) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 105
   at Gremlin.Net.Process.Traversal.Bytecode.AddStep(String stepName, Object[] 
args) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/Bytecode.cs:line
 88
   at Gremlin.Net.Process.Traversal.GraphTraversalSource.Inject[S](S[] starts) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/GraphTraversalSource.cs:line
 350
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.<>c.<.cctor>b__23_2(GraphTraversalSource
 g) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 42
   at 
Gremlin.Net.IntegrationTest.Gherkin.TraversalEvaluation.TraversalParser.GetTraversal(String
 traversalText, GraphTraversalSource g, IDictionary`2 contextParameterValues) 
in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/TraversalEvaluation/TraversalParser.cs:line
 69
   at Gremlin.Net.IntegrationTest.Gherkin.CommonSteps.TranslateTraversal(String 
traversalText) in 
/home/travis/build/apache/tinkerpop/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/CommonSteps.cs:line
 108
{code}

I'm not sure if anything can be discerned from these stracktraces, but, if not, 
the next time they fail in this way I will be sure to grab the entire travis 
output.



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