PVS-Studio warning V505 for Pixie

inline  void  triangulatePolygon(....) {
  ...
  for (i=1;i<nloops;i++) {
    ...
    do {
      ...
      do {
        ...
        CTriVertex *snVertex =
          (CTriVertex *) alloca(2*sizeof(CTriVertex));
        ...
      } while(dVertex != loops[0]);
      ...
    } while(sVertex != loops[i]);
    ...
  }
  ...
}

This suspicious code was found in Pixie project by PVS-Studio static code analyzer.
Warning message is:
V505 The 'alloca' function is used inside the loop. This can quickly overflow stack. ri polygons.cpp 1120

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/