QByteArray blah;
blah.fill( ' ', INT_MAX );	// ok
blah.append( "hello" );		// makes size negative (no exception/warning in Qt4, ASSERT "alloc/extra" in 5 -> "ignore")
QByteArray ba = blah.mid( INT_MAX - 1, 5 ); // empty array (no warning either)
uint s = blah.size();   // would be the correct size
int si = blah.size();
blah.remove( 0, INT_MAX - 5 ); // size still negative in Qt4, 0 in Qt5

QVector<char> v;
v.resize( INT_MAX / 2 - 16 );	// throws std::bad_alloc in Qt4, qAllocMore: "Requested size is too large!" in Qt5
v.fill( 'a', INT_MAX/2 - 16 );	// throws std::bad_alloc in Qt4, qAllocMore: "Requested size is too large!" in Qt5
v.resize( INT_MAX / 2 - 24 );	// ok in both
v.resize( INT_MAX / 2 - 17 );	// ok in Qt4, qAllocMore: "Requested size is too large!" in Qt5
v.resize( INT_MAX / 2 - 16 );	// ok in Qt4 (???), qAllocMore: "Requested size is too large!" in Qt5

v.fill( 'a' );		// ok
v.append( 'b' );	// ok
v.append( 'c' );	// qAllocMore: "Requested size is too large!" (if resized to INT_MAX/2-16 or -24 in Qt5)
v.append( 'd' );	// qAllocMore: "Requested size is too large!" (if resized to INT_MAX/2-17)
char c = v.last();