//! Reader suite: parsing, address lookup, malformed input and memory mapping.
//!
//! Every case reads a hand-written fixture rather than something `GsymBuilder`
//! produced, so a bug the writer and the reader share cannot survive by round
//! tripping through both. See `tests/writer` for the other direction.
/// The innermost frame name the reader resolves at `address`.
///
/// Panics when nothing covers `address`; use `lookup` directly to assert that a
/// gap really is a gap.