[BUG] Crash

``` Stack trace (most recent call last): #18 Object "", at 0x7ff81a06e8d7, in BaseThreadInitThunk #17 Object "", at 0x7ff81ba8f17c, in endthreadex #16 Object "", at 0x7ff81ba8f0ad, in beginthreadex #15 Object "", at 0x7fff2edb3723, in ZN2EE6System3Zip7addFileERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES9_ #14 Object "", at 0x7fff2f37c781, in ZThn1304_N2EE2UI11UITextInput27onDocumentDirtyOnFileSystemEPNS0_3Doc12TextDocumentE #13 Object "", at 0x7fff2ea66f5a, in ZN2EE6System7Process14startAsyncReadESt8functionIFvPKcyEES6_ #12 Object "", at 0x7ff63ca39e44, in ?? #11 Object "", at 0x7ff63d159c29, in ?? #10 Object "", at 0x7ff63d1f97f1, in ?? #9 Object "", at 0x7ff63d1e3f8b, in ?? #8 Object "", at 0x7ff63cfcd961, in ?? #7 Object "", at 0x7ff8194080da, in RaiseException #6 Object "", at 0x7ff81bc4a961, in RtlRaiseException #5 Object "", at 0x7ff81bc52327, in RtlLocateExtendedFeature #4 Object "", at 0x7ff81bda63ff, in _chkstk #3 Object "", at 0x7ff63d1e40d5, in ?? #2 Object "", at 0x7ff63cfcd891, in ?? #1 Object "", at 0x7ff63cfdea86, in ?? #0 Object "", at 0x7ff63d1e38c3, in ?? ``` - opened two python files, one new and one from a very old version - tried to open a file of unsupported encoding and closed the tab when no text appeared the crash happened when closing the still fully-functional editor on regular onclose/X symbol.