attempt to add check for mutation of range bound within loop; compiles but doesn't work as intended. pushed for feedback
attempt to add check for mutation of range bound within loop; compiles but doesn't work as intended. pushed for feedback

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