OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=21794
Crash type: Stack-buffer-underflow READ 16
Crash state:
fmt::v6::basic_format_args<fmt::v6::basic_format_context<std::__1::back_insert_i
fmt::v6::basic_format_args<fmt::v6::basic_format_context<std::__1::back_insert_i
fmt::v6::basic_format_context<std::__1::back_insert_iterator<fmt::v6::internal::