`java.io.File` has historically cached canonical paths, and part paths, to help the performance of the `File::getCanonicalFile` and `File::getCanonicalPath` when running with a `SecurityManager` set. The cache had correctness issues in environments with symbolic links and has been disabled by default since JDK 12. The cache has been removed in this release, along with the system properties `sun.io.useCanonCaches` and `sun.io.useCanonPrefixCache`. Setting these properties no longer has any effect.