bail out given class member call

Author: retailcoder

Rubberduck.CodeAnalysis/Inspections/Concrete/NonReturningFunctionInspection.cs

@@ -70,6 +70,12 @@ private bool IsAssignedByRefArgument(Declaration enclosingProcedure, IdentifierR
             var procedure = State.DeclarationFinder.MatchName(procedureName)
                 .Where(p => AccessibilityCheck.IsAccessible(enclosingProcedure, p))
                 .SingleOrDefault(p => !p.DeclarationType.HasFlag(DeclarationType.Property) || p.DeclarationType.HasFlag(DeclarationType.PropertyGet));
+            if (procedure?.ParentScopeDeclaration is ClassModuleDeclaration)
+            {
+                // we can't know that the member is on the class' default interface
+                return false;
+            }
+
             var parameters = State.DeclarationFinder.Parameters(procedure);
 
             ParameterDeclaration parameter;

RubberduckTests/Inspections/NonReturningFunctionInspectionTests.cs

@@ -217,6 +217,35 @@ End Sub
             }
         }
 
+        [Test]
+        [Category("Inspections")]
+        public void NonReturningFunction_NoResult_GivenClassMemberCall()
+        {
+            const string code = @"
+Public Function Foo() As Boolean
+    With New Class1
+        .ByRefAssign Foo
+    End With
+End Function
+";
+            const string classCode = @"
+Public Sub ByRefAssign(ByRef b As Boolean)
+End Sub
+";
+            var builder = new MockVbeBuilder();
+            builder.ProjectBuilder("TestProject", ProjectProtection.Unprotected)
+                .AddComponent("TestModule1", ComponentType.StandardModule, code)
+                .AddComponent("Class1", ComponentType.ClassModule, classCode);
+            var vbe = builder.Build();
+            using (var state = MockParser.CreateAndParse(vbe.Object))
+            {
+                var inspection = new NonReturningFunctionInspection(state);
+                var inspectionResults = inspection.GetInspectionResults(CancellationToken.None);
+
+                Assert.AreEqual(0, inspectionResults.Count());
+            }
+        }
+
         [Test]
         [Category("Inspections")]
         public void NonReturningFunction_NoResult_GivenByRefAssignment_WithNamedArgument()