cmark: Index-out-of-bounds in S_render_node

Project: https://github.com/jgm/cmark.git https://github.com/commonmark/cmark.git Detailed report: https://oss-fuzz.com/testcase?key=5546760854306816 Project: cmark Fuzzer: libFuzzercmarkfuzzer Fuzz target binary: cmarkfuzzer Job Type: libfuzzerubsancmark Platform Id: linux Crash Type:...