Replace 'visibleVariablesByName()' calls with a safe implementation

idea/idea-jvm/src/org/jetbrains/kotlin/idea/debugger/KotlinCoroutinesAsyncStackTraceProvider.kt

@@ -91,7 +91,7 @@ class KotlinCoroutinesAsyncStackTraceProvider : AsyncStackTraceProvider {
             return null
         }
 
-        val continuationVariable = frameProxy.visibleVariableByName("\$continuation") ?: return null
+        val continuationVariable = frameProxy.safeVisibleVariableByName("\$continuation") ?: return null
         val continuation = frameProxy.getValue(continuationVariable) as? ObjectReference ?: return null
 
         return collectFrames(continuation)

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

@@ -293,7 +293,7 @@ class VariableFinder private constructor(private val context: EvaluationContextI
             return null
         }
 
-        val continuationVariable = frameProxy.visibleVariableByName("\$continuation") ?: return null
+        val continuationVariable = frameProxy.safeVisibleVariableByName("\$continuation") ?: return null
         val continuation = frameProxy.getValue(continuationVariable) as? ObjectReference ?: return null
         return findCoroutineContextForContinuation(continuation)
     }

idea/idea-jvm/src/org/jetbrains/kotlin/idea/debugger/safeUtil.kt

@@ -15,6 +15,10 @@ fun StackFrameProxyImpl.safeVisibleVariables(): List<LocalVariableProxyImpl> {
     return wrapAbsentInformationException { visibleVariables() } ?: emptyList()
 }
 
+fun StackFrameProxyImpl.safeVisibleVariableByName(name: String): LocalVariableProxyImpl? {
+    return wrapAbsentInformationException { visibleVariableByName(name) }
+}
+
 fun Method.safeAllLineLocations(): List<Location> {
     return DebuggerUtilsEx.allLineLocations(this) ?: emptyList()
 }