Export hangs on certain image modifier stacks
Import the attached raw photo and its two .xmp versions. Select each and do an export to file.
Expected: both images complete export successfully.
Actual: the _01.xmp version hangs the export and never completes.
I have tested this on two systems, one MBP 2010 on High Sierra (has bug), one 2014 iMac on Mojave (does not have bug, tested with and without OpenCL). These machines also have slightly different Darktable settings, library etc. so that's a possibility. I have come across other images that also trigger the bug, moreover, except for the suspected cause of the bug it's just like issue #12548:
- export hangs and never completes
- if I cancel and do a second attempt (regardless if that image triggers it or not) it just reads "exporting images" and does not export any files.
- after doing the above, darktable hangs on quit