prevent exception if complex value does not contain a measured clause

Source/Parser/Expressions/Trigger/MeasuredRequirementExpression.cs

@@ -207,7 +207,8 @@ internal static void EnsureHasMeasuredRequirement(List<Requirement> requirements
                 }
             }
 
-            last.Type = RequirementType.Measured;
+            if (last != null)
+                last.Type = RequirementType.Measured;
         }
     }
 }

Source/Parser/ValueBuilder.cs

@@ -93,6 +93,12 @@ public static Value BuildValue(ExpressionBase expression, SerializationContext s
             // ensure there's a Measured condition
             MeasuredRequirementExpression.EnsureHasMeasuredRequirement(requirements);
 
+            if (!requirements.Any(r => r.IsMeasured))
+            {
+                error = InconvertibleError(expression);
+                return null;
+            }
+
             return new Value(new[] { requirements });
         }
 

Tests/Parser/ValueBuilderTests.cs

@@ -175,5 +175,17 @@ public void TestMergeBits()
             var serialized = value.Serialize(new SerializationContext { MinimumVersion = Version._1_0 });
             Assert.That(serialized, Is.EqualTo("M:0xK000001"));
         }
+
+        [Test]
+        public void TestPauseWithoutMeasured()
+        {
+            string input = "disable_when(byte(0x1234) == 1)";
+            var clause = TriggerExpressionTests.Parse(input);
+
+            ErrorExpression error;
+            var value = ValueBuilder.BuildValue(clause, out error);
+            Assert.That(value, Is.Null);
+            ExpressionTests.AssertError(error, "Cannot create value from requirement");
+        }
     }
 }