QPixmap & QPixmapCache cache wrong data if subsecuently load several paths

Code snippet to reproduce:

QPixmap pix1;
pix1.load("path1");
...
pix1.load("path2");

QPixmap pix2;
pix2.load("path1");//error - actually path2 is loaded

Attached sample app, run, press button1, then press button2.

Checked only on Mac.