https://doc.rust-lang.org/stable/nightly-rustc/rustc_middle/ty/normalize_erasing_regions/enum.NormalizationError.html
NormalizationError in rustc_middle::ty::normalize_erasing_regions - Rust
API documentation for the Rust `NormalizationError` enum in crate `rustc_middle`.
rustcmiddletynormalizeerasing