segfaults may have a missing b field. mongosymb.py should be smart enough to ignore it.

See this snippet from convo on Slack.

I’m running like this: python buildscripts/resmoke.py symbolize -t mongodb_mongo_v5.0_enterprise_rhel_80_64_bit_dynamic_required_display_jstestfuzz_concurrent_replication_1928c8d20941bdaf094507d0b1616ca58d530330_21_07_20_19_56_18 < backtrace.log

backtrace.log is attached.

This is the problematic line: