Uninitialized scalar field

The field will contain an arbitrary value left over from earlier computations. A scalar field is not initialized by the constructor
/src/mongo/db/pipeline/expression_context.h:333: UNINIT_CTOR 114585 Class member declaration for "jsFnTimeoutMillis".
/src/mongo/db/pipeline/expression_context.cpp:128: UNINIT_CTOR 114585 Non-static class member "jsFnTimeoutMillis" is not initialized in this constructor nor in any functions that it calls.