Serhiy Storchaka added the comment: Arguments for PhotoImage.zoom() are zoom factors, not the dimension of the result. In you case you are trying to create an image with size 54000x29964 pixels. This is over 1.6 gigapixels. Here is pure Tcl equivalent of Python example. It should reproduce the crash. There is a documentation bug in Tkinter. PhotoImage.zoom() docstring is not clear. This can and should be fixed. There is a bug in Tk. It shouldn't crash processing image even if the result has incredible size. But we can't do anything with this bug besides reporting to mainstream. Requalified this issue as easy documentation issue. ---------- assignee: -> docs@python components: +Documentation keywords: +easy nosy: +docs@python stage: -> needs patch type: crash -> enhancement versions: +Python 3.5, Python 3.6 -Python 3.4 Added file: http://bugs.python.org/file41433/test_issue25959.tcl _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue25959> _______________________________________