OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25076
Crash type: Use-of-uninitialized-value Crash state: std::__1::char_traits<char>::length std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<ch Magick::formatExceptionMessage