Valgrind memory analizer doesn't stop correctly

1. Valgrind memory analyzer (with, without GDB) started for manual_test_debugger_gui
2. Stop analyzing by the "Stop" button

Behavior

1. Application is closed
2. Analyzing isn't stop and continues forever. The progress bar increases but after more than an hour doesn't reach the end. 
3. If close qtcreator without stopping the application by the "Stop" button inside the application output tab. Qtcreator stops only with "ctrl + C" in the terminal. Details are in the videos below. valgrind_doesnot_stop.mp4valgrind_qtc_donot_stop.mp4

Expected behavior

1. Application is stoped
2. Valgrind(and GDB) is stopped, and analyzing is stopped.

Recovery

• restart qtc