also address TyStr in the null pointer optimization
also address TyStr in the null pointer optimization
rust-lang/miri,tsion/miri,GBGamer/rust,GBGamer/rust,rust-lang/miri,rust-lang/miri,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,rust-lang/miri,GBGamer/rust,GBGamer/rust,graydon/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust