If running Ubuntu,
The recommended way to enable the needed ptrace kernel setting (hinted by qtcreator) is to edit /etc/sysctl.d/10-ptrace.conf
sudo vim /etc/sysctl.d/10-ptrace.conf
Then change
kernel.yama.ptrace_scope = 1
to
kernel.yama.ptrace_scope = 0
Save,
then apply:
$ sudo sysctl --system -a -p|grep yama
kernel.yama.ptrace_scope = 0
run
man sysctl
for more info.