D 2020-10-25T22:10:52.236
J icomment Looking\sat\sthe\scode,\sit\sseems\sthat\s`objc_destructInstance()`\sdoes\snot\szero\sweak\sreferences\sat\sall\sin\sthe\sApple\sruntime.\sIt\sseems\sto\smake\sweak\sreferences\swork\sat\sall,\sit\sis\snecessary\sto\scall\sinto\sthe\sruntime\sfunctions\sto\sallocate,\sretain,\srelease\sand\sdealloc\sobjects.\sUnfortunately,\sthis\sdoes\snot\sallow\sto\shave\ssome\sextra\sspace\sbefore\sthe\sobject,\sas\sthe\scurrent\s`+[alloc]`\sdoes\sfor\smemory\sblocks\sbelonging\sto\sthe\sobject.
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