With clustered indexes, calling RecordId::asLong() on a RecordId that has the String underlying type will trigger an invariant.

I've compiled a list of these calls located in SBE code.

• src/mongo/db/exec/sbe/stages/ix_scan.cpp
  • https://github.com/mongodb/mongo/blob/275bc8977cfd8845cb4773d639504698cd99de90/src/mongo/db/exec/sbe/stages/ix_scan.cpp#L293-L294
• src/mongo/db/exec/sbe/stages/scan.cpp
  • https://github.com/mongodb/mongo/blob/275bc8977cfd8845cb4773d639504698cd99de90/src/mongo/db/exec/sbe/stages/scan.cpp#L236-L237
  • https://github.com/mongodb/mongo/blob/275bc8977cfd8845cb4773d639504698cd99de90/src/mongo/db/exec/sbe/stages/scan.cpp#L565-L566
• src/mongo/db/query/sbe_stage_builder_coll_scan.cpp
  • https://github.com/mongodb/mongo/blob/275bc8977cfd8845cb4773d639504698cd99de90/src/mongo/db/query/sbe_stage_builder_coll_scan.cpp#L189
  • https://github.com/mongodb/mongo/blob/275bc8977cfd8845cb4773d639504698cd99de90/src/mongo/db/query/sbe_stage_builder_coll_scan.cpp#L312
  • https://github.com/mongodb/mongo/blob/275bc8977cfd8845cb4773d639504698cd99de90/src/mongo/db/query/sbe_stage_builder_coll_scan.cpp#L464