unpretty

present the input source, unstable (and less-pretty) variants; normal, expanded, expanded,identified, expanded,hygiene (with internal representations), ast-tree (raw AST before expansion), ast-tree,expanded (raw AST after expansion), hir (the HIR), hir,identified, hir,typed (HIR with types for each node), hir-tree (dump the raw HIR), thir-tree, thir-flat, mir (the MIR), or mir-cfg (graphviz formatted MIR)

This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.