replace `binder_depth` in `LateBoundRegionsDetector`
replace `binder_depth` in `LateBoundRegionsDetector`

Co-authored-by: csmoe <fcf1e72dff0420315a21b2eca780144689813ae4@users.noreply.github.com>

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