Symbol confusion after hasher panic in `intaglio` interners

Affected versions of this crate can leave all SymbolTable variants in an internally inconsistent state if a custom BuildHasher panics during HashMap::insert and the caller recovers with catchunwind. The intern implementations committed a vec.push... before the matching map.insert... completed. If...

Unsoundness in `intern` methods on `intaglio` symbol interners

Affected versions of this crate have a stacked borrows violation when creating references to interned contents. All interner types are affected. The flaw was corrected in version 1.9.0 by reordering move and borrowing operations and storing interned contents by raw pointer instead of as a Box...