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  1. Qt Creator
  2. QTCREATORBUG-12556

CppTodoItemsScanner and QmlJsTodoItemsScanner trigger undefined behavior

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    • 919f26a488c76afea081d1d11948f30a6f90a1b3 817d02d11385a06e9b964cf7eef4004e112b66d8 329952f5ee792484bdb53141fcfb3dba15f05a60

    Description

      In these classes, a Qt::DirectConnection is created to signals of the C++ and QmlJs code models, respectively, and in the associated slots API functions from other plugins are called, e.g. ProjectExplorer::Project::files(). This is seriously wrong, as these functions are not thread-safe. Not surprisingly, crashes due to this code have been observed.
      Unfortunately, the fix is not trivial, as a QueuedConnection also results in a crash, presumably because the TODO plugin calls back on the code models with the assumption that they are in the exact same state in which they emitted the signal.

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            fawzi Fawzi Mohamed
            kandeler Christian Kandeler
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