(CoroutineDebugger) Keep coroutine info list reference from collection

#KT-38606 Fixed

idea/jvm-debugger/jvm-debugger-coroutine/src/org/jetbrains/kotlin/idea/debugger/coroutine/proxy/mirror/coroutinesDebugMirror.kt

@@ -42,7 +42,7 @@ class DebugProbesImpl private constructor(context: DefaultExecutionContext) :
 
     fun dumpCoroutinesInfo(context: DefaultExecutionContext): List<MirrorOfCoroutineInfo> {
         instance ?: return emptyList()
-        val coroutinesInfoReference = objectValue(instance, dumpMethod, context)
+        val coroutinesInfoReference = context.keepReference(objectValue(instance, dumpMethod, context))
         val referenceList = javaLangListMirror.mirror(coroutinesInfoReference, context) ?: return emptyList()
         return referenceList.values.mapNotNull { coroutineInfo.mirror(it, context) }
     }

idea/jvm-debugger/jvm-debugger-util/src/org/jetbrains/kotlin/idea/debugger/evaluate/ExecutionContext.kt

@@ -42,6 +42,13 @@ class DefaultExecutionContext(evaluationContext: EvaluationContextImpl) : BaseEx
     val frameProxy: StackFrameProxyImpl?
         get() =
             evaluationContext.frameProxy
+
+    fun keepReference(ref: ObjectReference?): ObjectReference? {
+        ref?.let {
+            super.keepReference(ref)
+        }
+        return ref
+    }
 }
 
 sealed class BaseExecutionContext(val evaluationContext: EvaluationContextImpl) {