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[Dennis Knochenwefel <dennis.knochenwefel@xxxxxxxxxx>]

** Changed in: zorba
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1020942

Title:
  vector subscript out of range assertion hit on windows

Status in Zorba - The XQuery Processor:
  Fix Committed

Bug description:
  in src/zorbatypes/binary.cpp a lot of vectors are accessed with [0],
  e.g.:

      aBase64.theData.resize(
        copy_without_ws( aString, aLength, &aBase64.theData[0] )
      );

  if in this case aLength is of size 0 the assertion "vector subscript
  out of range" is hit on windows in debug build. This happens because
  size == pos in std::vector implementation on windows:

    reference operator[](size_type _Pos)
  		{	// subscript mutable sequence
     #if _ITERATOR_DEBUG_LEVEL == 2
  		if (size() <= _Pos)
  			{	// report error
  			_DEBUG_ERROR("vector subscript out of range");
  			_SCL_SECURE_OUT_OF_RANGE;
  			}

  Therefore, before accessing a vector with [0] one must check whether
  the size of the vector is > 0. Otherwise the mentioned assertion will
  trigger.

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