Fixed compile error after rebase.

Author: timcassell

src/BenchmarkDotNet/Code/DeclarationsProvider.cs

@@ -150,7 +150,7 @@ internal class TaskDeclarationsProvider : DeclarationsProvider
     {
         public TaskDeclarationsProvider(Descriptor descriptor) : base(descriptor) { }
 
-        public override string ExtraDefines => "#define RETURNS_AWAITABLE";
+        public override string ReturnsDefinition => "RETURNS_AWAITABLE";
 
         public override string AwaiterTypeName => WorkloadMethodReturnType.GetMethod(nameof(Task.GetAwaiter), BindingFlags.Public | BindingFlags.Instance).ReturnType.GetCorrectCSharpTypeName();
 

src/BenchmarkDotNet/Engines/IEngine.cs

@@ -6,6 +6,7 @@
 using BenchmarkDotNet.Reports;
 using JetBrains.Annotations;
 using Perfolizer.Horology;
+using NotNullAttribute = JetBrains.Annotations.NotNullAttribute;
 
 namespace BenchmarkDotNet.Engines
 {

src/BenchmarkDotNet/Toolchains/InProcess.Emit.Implementation/Emitters/TaskConsumeEmitter.cs

@@ -91,9 +91,9 @@ protected override void OnEmitCtorBodyOverride(ConstructorBuilder constructorBui
                 IL_0006: ldarg.0
                 IL_0007: call instance void BenchmarkDotNet.Autogenerated.Runnable_0::__SetContinuation()
              */
-            continuationMethod = EmitSetContinuationImpl(runnableEmitter);
+            setContinuationMethod = EmitSetContinuationImpl(runnableEmitter);
             ilBuilder.Emit(OpCodes.Ldarg_0);
-            ilBuilder.Emit(OpCodes.Call, continuationMethod);
+            ilBuilder.Emit(OpCodes.Call, setContinuationMethod);
         }
 
         public override MethodBuilder EmitActionImpl(RunnableEmitter runnableEmitter, string methodName, RunnableActionKind actionKind, int unrollFactor)