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  1. Qt
  2. QTBUG-78955

Freeze or crash in QJSEngine::evaluate()

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Details

    • d1047887a6fd4f890484203a01ee5f1eefc1a20a (qt/qtdeclarative/5.15)

    Description

      Build and run a simple QCoreApplication:

      #include <QCoreApplication>
      #include <QJSEngine>
      
      int main(int argc, char *argv[])
      {
          QCoreApplication a(argc, argv);
          QJSEngine().evaluate(QByteArray("Array(1E9)|1"));
          return 0;
      }
      

      It will take more than a minute or crash going oom.

      It seems as if this could be handled better because:

      • the JavaScript seems to only return what's behind the "|"
      • Array(1E9)
        

        will not freeze at all

      • Array(1E10)|1
        

        does not freeze either.

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            ulherman Ulf Hermann
            rlohning Robert Löhning
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            Dates

              Created:
              Updated: