named-checkconf crashes with invalid configuration files
The attached tarball contains a number of (invalid) fuzzer-generated configuration files that cause named-checkconf to crash. Although there is probably a common cause, each file in the tarball causes named-checkconf to exit with a segmentation fault at a different location (or with different reported arguments to the function that crashed).
The version of BIND tested was 9.15.6, running on Fedora 29, but the crash also happens on macOS.