Compiling build/opt/mongo/db/query/planner_access.o                             
In file included from src/mongo/platform/compiler.h:151:0,                      
                 from src/mongo/util/invariant.h:30,                            
                 from src/mongo/base/string_data.h:41,                          
                 from build/opt/mongo/base/error_codes.h:32,                    
                 from src/mongo/base/status.h:34,                               
                 from src/mongo/db/query/canonical_query.h:32,                  
                 from src/mongo/db/query/planner_access.h:31,                   
                 from src/mongo/db/query/planner_access.cpp:33:                 
src/mongo/db/query/planner_access.cpp: In static member function 'static mongo::QuerySolutionNode* mongo::QueryPlannerAccess::buildIndexedDataAccess(const mongo::CanonicalQuery&, mongo::MatchExpression*, bool, const std::vector<mongo::IndexEntry>&, const mongo::QueryPlannerParams&)':
src/mongo/util/invariant.h:51:41: error: enum constant in boolean context [-Werror=int-in-bool-context]
         if (MONGO_unlikely(!(_Expression))) {                           \      
                                         ^
src/mongo/platform/compiler_gcc.h:77:80: note: in definition of macro 'MONGO_unlikely'
  MONGO_unlikely(x) static_cast<bool>(__builtin_expect(static_cast<bool>(x), 0))
                                                                         ^
src/mongo/util/invariant.h:56:19: note: in expansion of macro 'MONGO_invariant' 
 #define invariant MONGO_invariant
                   ^~~~~~~~~~~~~~~
src/mongo/db/query/planner_access.cpp:1218:13: note: in expansion of macro 'invariant'
             invariant(MatchExpression::ELEM_MATCH_OBJECT);                     
             ^~~~~~~~~
cc1plus: all warnings being treated as errors                                   
scons: *** [build/opt/mongo/db/query/planner_access.o] Error 1                  
scons: building terminated because of errors.                                   
build/opt/mongo/db/query/planner_access.o failed: Error 1