"Maximum call stack size exceeded" is thrown when using carry forward

[JaneSjs]

T21927 - Not able to load surveyjs model.
https://surveyjs.answerdesk.io/internal/ticket/details/T21927

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To reproduce the issue, run the demo from the last comment and observe the following exception:

Uncaught RangeError: Maximum call stack size exceeded
    at Function.isArray (<anonymous>)
    at ./src/entries/core.ts.Helpers.isValueEmpty (survey.core.js:518:19)
    at ./src/entries/core.ts.Helpers.isTwoValueEquals (survey.core.js:638:23)
    at ./src/entries/core.ts.Base.isTwoValueEquals (survey.core.js:9325:32)
    at ./src/entries/core.ts.Base.setPropertyValue (survey.core.js:8820:27)
    at ./src/entries/core.ts.ItemValue.setValue (survey.core.js:21023:18)
    at ItemValue.set (survey.core.js:21004:18)
    at ./src/entries/core.ts.JsonObjectProperty.setValue (survey.core.js:1605:32)
    at ./src/entries/core.ts.JsonObject.valueToObj (survey.core.js:3153:26)
    at ./src/entries/core.ts.JsonObject.setPropertyValueToObj (survey.core.js:3044:18)
    at ./src/entries/core.ts.JsonObject.toObjectCore (survey.core.js:3015:18)
    at ./src/entries/core.ts.JsonObject.toObject (survey.core.js:2986:14)
    at ./src/entries/core.ts.ItemValue.setData (survey.core.js:21123:41)
    at new ItemValue (survey.core.js:20819:19)
    at JsonMetadataClass.eval [as creator] (survey.core.js:21310:30)
    at ./src/entries/core.ts.JsonMetadata.createClass (survey.core.js:2582:34)
    at ./src/entries/core.ts.QuestionSelectBase.createItemValue (survey.core.js:47990:30)
    at ./src/entries/core.ts.QuestionSelectBase.getChoicesFromArrayQuestion (survey.core.js:49343:31)
    at QuestionTagboxModel.get (survey.core.js:49269:29)
    at ./src/entries/core.ts.QuestionCheckboxModel.getVisibleEnableItems (survey.core.js:56685:26)
    at ./src/entries/core.ts.QuestionCheckboxModel.allElementsSelected (survey.core.js:56426:26)
    at ./src/entries/core.ts.QuestionTagboxModel.allElementsSelected (survey.core.js:57680:59)
    at QuestionTagboxModel.get (survey.core.js:56404:25)
    at ./src/entries/core.ts.QuestionCheckboxModel.isItemSelectedCore (survey.core.js:56492:25)
    at ./src/entries/core.ts.QuestionSelectBase.isItemSelected (survey.core.js:49765:21)
    at ComputedUpdater.eval [as _updater] (survey.core.js:21216:89)
    at Object.eval [as func] (survey.core.js:1316:88)
    at ./src/entries/core.ts.Base.propertyValueChanged (survey.core.js:8867:47)
    at ./src/entries/core.ts.Base.setPropertyValue (survey.core.js:8821:26)
    at ItemValue.set (survey.core.js:1350:30)
    at new ItemValue (survey.core.js:20827:20)
    at JsonMetadataClass.eval [as creator] (survey.core.js:21310:30)
    at ./src/entries/core.ts.JsonMetadata.createClass (survey.core.js:2582:34)
    at ./src/entries/core.ts.QuestionSelectBase.createItemValue (survey.core.js:47990:30)
    at ./src/entries/core.ts.QuestionSelectBase.getChoicesFromArrayQuestion (survey.core.js:49343:31)
    at QuestionTagboxModel.get (survey.core.js:49269:29)
    at ./src/entries/core.ts.QuestionCheckboxModel.getVisibleEnableItems (survey.core.js:56685:26)
    at ./src/entries/core.ts.QuestionCheckboxModel.allElementsSelected (survey.core.js:56426:26)
    at ./src/entries/core.ts.QuestionTagboxModel.allElementsSelected (survey.core.js:57680:59)
    at QuestionTagboxModel.get (survey.core.js:56404:25)
    at ./src/entries/core.ts.QuestionCheckboxModel.isItemSelectedCore (survey.core.js:56492:25)
    at ./src/entries/core.ts.QuestionSelectBase.isItemSelected (survey.core.js:49765:21)
    at ComputedUpdater.eval [as _updater] (survey.core.js:21216:89)
    at Object.eval [as func] (survey.core.js:1316:88)
    at ./src/entries/core.ts.Base.propertyValueChanged (survey.core.js:8867:47)
    at ./src/entries/core.ts.Base.setPropertyValue (survey.core.js:8821:26)
    at ItemValue.set (survey.core.js:1350:30)
    at new ItemValue (survey.core.js:20827:20)
    at JsonMetadataClass.eval [as creator] (survey.core.js:21310:30)
    at ./src/entries/core.ts.JsonMetadata.createClass (survey.core.js:2582:34)

[andrewtelnov]

This PR fixes the issue.

Thank you,
Andrew