https://mongodb.slack.com/archives/C02TYVCDYHZ/p1650373327707989

There’s something weird going on with the global csfle library state management. In a situation in which there is no global system csfle library, if a mongocrypt_t is initialized with csfleSearchPaths: ['$SYSTEM'], the library is being used even if there is no global shared library but if another mongocrypt_t was previously initialized with csflePath set to a shared library path

i.e.

> new MongoCrypt({ csfleSearchPaths: ['$SYSTEM'] }).csfleVersionInfo
null
> new MongoCrypt({ }).csfleVersionInfo
null
> new MongoCrypt({ csflePath: '/.../mongo_csfle_v1.so', csfleSearchPaths: ['$SYSTEM'] }).csfleVersionInfo
{ version: 105553653141504n, versionStr: 'stubbed-mongo_csfle' }
> new MongoCrypt({ csfleSearchPaths: ['$SYSTEM'] }).csfleVersionInfo
{ version: 105553653141504n, versionStr: 'stubbed-mongo_csfle' }
> new MongoCrypt({ }).csfleVersionInfo
null
even though the 4th call and the 1st one specify the same options