GVN: Do not flatten derefs with ProjectionElem::Index. r? `@saethlin` This should fix the bug you found with https://github.com/rust-lang/rust/pull/131650
GVN: Do not flatten derefs with ProjectionElem::Index. r? `@saethlin` This should fix the bug you found with https://github.com/rust-lang/rust/pull/131650