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  1. Qpid
  2. QPID-3206

Variant converts from negative number in string format to unsigned integer without error

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.8, 0.10
    • Fix Version/s: 0.11
    • Component/s: C++ Broker, C++ Client
    • Labels:
      None

      Description

      E.g.
      uint16_t i = 0;
      qpid::types::Variant v = "-5";
      i = v;

      The above results in an exception in older versions of gcc (e.g. 4.1.2) but sets i to 65531 on later versions (e.g. 4.4.4). This is a result of a fix to the gcc std library to be compliant with specification which requires stringstream to accept negative values even for unsigned ints (which is the behaviour of scanf).

      See e.g:
      http://boost.2283326.n4.nabble.com/conversion-lexical-cast-doesn-t-throw-td2593967.html
      http://groups.google.com/group/comp.lang.c++.moderated/browse_thread/thread/97475b21515462c9/ce369a327fa39243#ce369a327fa39243

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            • Assignee:
              gsim Gordon Sim
              Reporter:
              gsim Gordon Sim
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              • Created:
                Updated:
                Resolved: