error，you know why? thanks

[NewYork7]

CMakeFiles/my_planner.dir/src/quadratic_calculator.cpp.o: file not recognized: File truncated
collect2: error: ld returned 1 exit status
navigation-melodic/global_planner/CMakeFiles/my_planner.dir/build.make:348: recipe for target '/home/wheeltec/wheeltec_robot/devel/lib/libmy_planner.so' failed
make[2]: *** [/home/wheeltec/wheeltec_robot/devel/lib/libmy_planner.so] Error 1
CMakeFiles/Makefile2:14383: recipe for target 'navigation-melodic/global_planner/CMakeFiles/my_planner.dir/all' failed
make[1]: *** [navigation-melodic/global_planner/CMakeFiles/my_planner.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 97%] Built target dwa_local_planner
[ 97%] Built target move_base
Makefile:140: recipe for target 'all' failed
make: *** [all] Error 2
Invoking "make -j4 -l4" failed