add delay_span_bug to TransmuteSizeDiff, just to be sure
add delay_span_bug to TransmuteSizeDiff, just to be sure

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