Audi OEM 5-cyl trigger pattern aka "Tri-Tach" https://rusefi.com/forum/viewtopic.php?f=5&t=1912

firmware/controllers/trigger/decoders/trigger_structure.cpp

@@ -228,9 +228,10 @@ void TriggerWaveform::addEvent(angle_t angle, trigger_wheel_e const channelIndex
 	}
 
 #if EFI_UNIT_TEST
+	assertIsInBounds(privateTriggerDefinitionSize, triggerSignalIndeces, "trigger shape overflow");
 	triggerSignalIndeces[privateTriggerDefinitionSize] = channelIndex;
 	triggerSignalStates[privateTriggerDefinitionSize] = stateParam;
-#endif
+#endif // EFI_UNIT_TEST
 
 
 	// todo: the whole 'useOnlyRisingEdgeForTrigger' parameter and logic should not be here

firmware/util/efilib.h

@@ -105,6 +105,8 @@ constexpr size_t size(const T(&)[N]) {
 }
 } // namespace efi
 
+#define assertIsInBounds(length, array, msg) efiAssertVoid(OBD_PCM_Processor_Fault, (length) >= 0 && (length) < efi::size(array), msg)
+
 /**
  * Copies an array from src to dest.  The lengths of the arrays must match.
  */