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...ed address. > > (settings-parser.c:1597 in settings_dup_full()) > src = CONST_PTR_OFFSET(set, def->offset); > > (gdb) p set > $2 = (const void *) 0x55968 > (gdb) p *def > $3 = {type = SET_SIZE, key = 0x2d548 "submission_max_mail_size", offset = 20, list_info = 0x0} This is unexpected. But I don't see how it's a Dovecot bug. It seems as if your compiler doesn't do padding correctly and then crashes because it didn't do it correctly. I guess you're compiling this as 32bit? Is size_t 32bit or 64bit? Can you try with the below small t...

...>offset"=20 => misaligned address. (settings-parser.c:1597 in settings_dup_full()) src = CONST_PTR_OFFSET(set, def->offset); (gdb) p set $2 = (const void *) 0x55968 (gdb) p *def $3 = {type = SET_SIZE, key = 0x2d548 "submission_max_mail_size", offset = 20, list_info = 0x0} (gdb) bt full #0 0xff190690 in setting_copy (type=SET_SIZE, src=0x5798c, dest=0xf7ed4, pool=0xf29a0, keep_values=false) at settings-parser.c:1519 src_size = 0x5798c dest_size = 0xf7ed4 __func__ = "setting_copy" #1 0xff190bc4 in settings_dup_full (info=0x2d9a...