Due to a problem in the Quartus® II software version 15.0 Update 2, when the Single Event Upset(SEU) feature is implemented in the Cyclone® V device with the following clock constraint, you may find minimum pulse width timing violations for some signals in Fault Injection IP.
create_clock -name intosc -period 10.000 [get_nets {*fault_injection_0|alt_fault_injection_component|alt_fi_inst|intosc}]
The problem is fixed beginning with the Intel® Quartus® Prime Standard Edition software version 16.0r.