In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h: In member function 'Value_type& Map<Key_type, Value_type, Key_compare>::operator[](const Key_type&)':
/in/Map.h:191:3: error: 'entries' was not declared in this scope
   entries.insert({k, Value_type()});
   ^~~~~~~
/in/Compile/Makefile:32: recipe for target 'Map_compile_check.exe' failed
make: *** [Map_compile_check.exe] Error 1