Auto merge of #28919 - huonw:placement-tracking-issue, r=alexcrichton
Auto merge of #28919 - huonw:placement-tracking-issue, r=alexcrichton

cc #28244

graydon/rust,graydon/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,aidancully/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,GBGamer/rust,graydon/rust,GBGamer/rust,GBGamer/rust,aidancully/rust