opencensus-cpp:cloud_trace_context_fuzzer: Crash with empty stacktrace

Detailed Report: https://oss-fuzz.com/testcase?key=4879760055468032 Project: opencensus-cpp Fuzzing Engine: libFuzzer Fuzz Target: cloudtracecontextfuzzer Job Type: libfuzzermsanopencensus-cpp Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0x7fb0516cf994 Crash State: NULL Sanitizer:...