CONFIG_DEBUG_USER is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Verbose user fault messages


Linux Kernel Configuration
└─>Verbose user fault messages
In linux kernel since version 2.6.12  
When a user program crashes due to an exception, the kernel can
print a brief message explaining what the problem was. This is
sometimes helpful for debugging but serves no purpose on a
production system. Most people should say N here.

In addition, you need to pass user_debug=N on the kernel command
line to enable this feature. N consists of the sum of:

1 - undefined instruction events
2 - system calls
4 - invalid data aborts
8 - SIGSEGV faults
16 - SIGBUS faults