address the comments

Author: man-zhang

core/src/main/kotlin/org/evomaster/core/problem/httpws/HttpWsCallResult.kt

@@ -46,6 +46,12 @@ abstract class HttpWsCallResult : EnterpriseActionResult {
 
     }
 
+    /**
+     * this is used to record observed flakiness during flakiness handling
+     */
+    private val flakyObservations: MutableList<FlakyObservation> = mutableListOf()
+
+
     /**
      * In some cases (eg infinite loop redirection), a HTTP call
      * might fail, and, as such, we might not have an actual "result"
@@ -269,7 +275,6 @@ abstract class HttpWsCallResult : EnterpriseActionResult {
         val valuesByExecIndex: Map<Int, String?>
     )
 
-    private val flakyObservations: MutableList<FlakyObservation> = mutableListOf()
 
     /**
      * Compare [other] result with [this] original call result

core/src/main/kotlin/org/evomaster/core/search/service/FlakinessDetector.kt

@@ -36,6 +36,10 @@ class FlakinessDetector<T: Individual> : TimeBoxedPhase {
     private lateinit var epc: ExecutionPhaseController
 
     override fun applyPhase() {
+        if (!config.handleFlakiness) {
+            throw IllegalStateException("handleFlakiness must be enabled before applying this phase of flakiness detection and handing with FlakinessDetector")
+        }
+
         if (config.enableStaticFlakyInference) {
             inferStaticFlakiness()
         }