There's a potential bug in the following code from rev 941 in TAppEncTop.cpp :: line 205

#if MULTIPLE_PTL_SUPPORT

Populate PTL in VPS
TComVPS *pVPS = m_acTEncTop[0].getVPS();
ProfileTierLevel& profileTierLevel = *(pVPS->getPTL(0)->getGeneralPTL());
for (int ii = 0; ii < m_numPTLInfo; ii++)
{

profileTierLevel = *(pVPS->getPTL(ii)->getGeneralPTL());

profileTierLevel.setLevelIdc(m_levelList[ii]);
profileTierLevel.setTierFlag(m_levelTierList[ii]);
profileTierLevel.setProfileIdc(m_profileList[ii]);
profileTierLevel.setProfileCompatibilityFlag(m_profileCompatibility[ii], 1);
profileTierLevel.setProgressiveSourceFlag(m_progressiveSourceFlagList[ii]);
profileTierLevel.setInterlacedSourceFlag(m_interlacedSourceFlagList[ii]);
profileTierLevel.setNonPackedConstraintFlag(m_nonPackedConstraintFlagList[ii]);
profileTierLevel.setFrameOnlyConstraintFlag(m_frameOnlyConstraintFlagList[ii]);

}
pVPS->setNumProfileTierLevel(m_numPTLInfo);

ProfileTierLevel& profileTierLevel = *(pVPS->getPTL(0)->getGeneralPTL()); --- defines 'profileTierLevel' as a reference bound to *(pVPS->getPTL(0)->getGeneralPTL()).

Then later tries to use that reference to modify *(pVPS->getPTL(ii)->getGeneralPTL()).

If the loop needs to modify other PTL structures, it won't work.
Why not use a pointer?

ProfileTierLevel *profileTierLevel = pVPS->getPTL(0)->getGeneralPTL();
for (int ii = 0; ii < m_numPTLInfo; ii++)
{

profileTierLevel = pVPS->getPTL(ii)->getGeneralPTL();

profileTierLevel->setLevelIdc(m_levelList[ii]);
profileTierLevel->setTierFlag(m_levelTierList[ii]);
profileTierLevel->setProfileIdc(m_profileList[ii]);
profileTierLevel->setProfileCompatibilityFlag(m_profileCompatibility[ii], 1);
profileTierLevel->setProgressiveSourceFlag(m_progressiveSourceFlagList[ii]);
profileTierLevel->setInterlacedSourceFlag(m_interlacedSourceFlagList[ii]);
profileTierLevel->setNonPackedConstraintFlag(m_nonPackedConstraintFlagList[ii]);
profileTierLevel->setFrameOnlyConstraintFlag(m_frameOnlyConstraintFlagList[ii]);