I've now seen three crashes where the GpgOL logs end with:
05:11:03/8916/mail.cpp:parsing_done:952: tracepoint 05:11:03/8916/oomhelp.cpp:get_oom_object: looking for 2797D4C0->`Attachments' 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 2797D4C0 released ref: 2 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 277F70B0 released ref: 1 05:11:03/8916/oomhelp.cpp:get_oom_object: got 277F70B0 05:11:03/8916/oomhelp.cpp:get_oom_object: looking for 277F70B0->`Item(1)' 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 277F70B0 released ref: 1 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 277F72C0 released ref: 1 05:11:03/8916/oomhelp.cpp:get_oom_object: got 277F72C0 05:11:03/8916/oomhelp.cpp:get_pa_variant: Looking up property: http://schemas.microsoft.com/mapi/proptag/0x7FFE000B; 05:11:03/8916/oomhelp.cpp:get_oom_object: looking for 277F72C0->`PropertyAccessor' 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 277F72C0 released ref: 1 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 277F7268 released ref: 1 05:11:03/8916/oomhelp.cpp:get_oom_object: got 277F7268 05:11:03/8916/oomhelp.cpp:get_pa_variant: Object: 277F7268 released ref: 0 05:11:03/8916/mail.cpp:check_attachments: Object: 277F72C0 released ref: 0 05:11:03/8916/oomhelp.cpp:get_oom_object: looking for 277F70B0->`Item(2)' 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 277F70B0 released ref: 1 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 277F7000 released ref: 1 05:11:03/8916/oomhelp.cpp:get_oom_object: got 277F7000 05:11:03/8916/oomhelp.cpp:get_pa_variant: Looking up property: http://schemas.microsoft.com/mapi/proptag/0x7FFE000B; 05:11:03/8916/oomhelp.cpp:get_oom_object: looking for 277F7000->`PropertyAccessor' 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 277F7000 released ref: 1 05:11:03/8916/oomhelp.cpp:get_oom_object: Object: 277F6D98 released ref: 1 05:11:03/8916/oomhelp.cpp:get_oom_object: got 277F6D98 05:11:03/8916/oomhelp.cpp:get_pa_variant: Object: 277F6D98 released ref: 0 05:11:03/8916/mail.cpp:check_attachments: Object: 277F7000 released ref: 0 05:11:03/8916/mail.cpp:check_attachments: Object: 277F70B0 released ref: 0
This is partially reproducible for me. Crash -> High prio.