Auto merge of #30312 - seanmonstar:ioerror-description, r=alexcrichton
Auto merge of #30312 - seanmonstar:ioerror-description, r=alexcrichton

cc @pnkfelix @alexcrichton

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