mruby/mruby_fuzzer: Use-of-uninitialized-value in ht_copy

Project: https://github.com/mruby/mruby.git Detailed report: https://oss-fuzz.com/testcase?key=5098398899765248 Project: mruby Fuzzer: libFuzzermrubyfuzzer Fuzz target binary: mrubyfuzzer Job Type: libfuzzermsanmruby Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash...