Hello, I suggest to contact upstream [1] and discuss with them the appropriate fix for this issue if you are unable to reproduce it. Sometimes crashes can only be reproduced with certain compiler flags and/or compiler versions. I also wonder if gthumb is supposed to crash at all. CVE-2018-18718 is about a double-free vulnerability. Regards, Markus [1] https://gitlab.gnome.org/GNOME/gthumb/issues/18
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