Running the with_mongot_extension_* suites (SERVER-130648), any test that uses the extension-provided $vectorSearch inside a $lookup or $graphLookup subpipeline hits MONGO_UNREACHABLE_TASSERT(12197200) in DocumentSourceExtensionOptimizable::getFirstStageViewApplicationPolicy() (src/mongo/db/extension/host/document_source_extension_optimizable.h). The comment there states view resolution should happen after desugaring, so the method should be unreachable -- but the $lookup subpipeline path reaches it. Because it is a tripwire assertion, mongod then fassert-crashes at shutdown (exit code 14), failing fixture teardown for the whole job.

Affected tests are excluded in buildscripts/resmokeconfig/matrix_suites/overrides/with_mongot_extension.yml; grep this ticket number to find them.

Repro: buildscripts/resmoke.py run --suites=with_mongot_extension_single_node --force-excluded-tests jstests/with_mongot/e2e/vector_search/lookup_vector_search.js

The tassert was introduced in SERVER-125517.