Coverity found a Quality issue: Dereference null return value

Details:

Coverity Issue ID: 184425
Issue Description: Return value of function which returns null is dereferenced without checking
Potential Impact: If the function actually returns a null value, a null pointer dereference will occur.
Coverity checker: NULL_RETURNS
Branch: master
File path: /src/mongo/db/ftdc/ftdc_system_stats_linux.cpp
Line number: Unknown

What Coverity Detected (Main Finding)

Dereferencing "this->_gstrings", which is known to be "nullptr".

The issue can be viewed in Coverity here.

How do I fix this?

Refer to https://wiki.corp.mongodb.com/spaces/HGTC/pages/385852267/Guidance+on+fixing+Coverity+issues for guidance on fixing Coverity issues.