getParameter for featureCompatibilityVersion on uninitialized replica set member causes crash on MongoDB 3.7.5

Trying to retrieve the featureCompatibilityVersion for an uninitialized replica set member on MongoDB 3.7.5 results in an invariant failure.

To reproduce:

1. Start with a basic configuration for the first node of a replica set /usr/local/mongo375/bin/mongod --dbpath 375 --replSet foo --port 27000
2. Connect to it and run db.runCommand({getParameter:1, featureCompatibilityVersion:1})
3. Check mongod logs for invariant failures

2018-04-20T19:56:09.052+0000 F -        [conn1] Invariant failure isVersionInitialized() src/mongo/db/server_options.h 207

Full log attached.