From c222234adcce1453272765bcf8b2c085dfd74d93 Mon Sep 17 00:00:00 2001
From: Igor Kravchenko <igor.kravchenko@masterofcode.com>
Date: Thu, 1 Oct 2020 12:47:21 +0300
Subject: [PATCH] replaces fatalError with assertionFailure in 'changeState'

---
 Sources/FirebladeECS/FSM.swift | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Sources/FirebladeECS/FSM.swift b/Sources/FirebladeECS/FSM.swift
index 9b91234..cd7309e 100644
--- a/Sources/FirebladeECS/FSM.swift
+++ b/Sources/FirebladeECS/FSM.swift
@@ -270,6 +270,7 @@ public class StateComponentMapping {
     /// so that a fluent interface can be used when configuring entity states.
     /// - Parameter type: The type of component to add a mapping to the state for
     /// - Returns: The new ComponentMapping for that type
+    @discardableResult
     public func add(_ type: ComponentInitializable.Type) -> StateComponentMapping {
         creatingState.add(type)
     }
@@ -327,7 +328,8 @@ public class EntityStateMachine<StateName: Hashable> {
     /// - Parameter name: The name of the state to change to.
     public func changeState(name: StateName) {
         guard let newState = states[name] else {
-            fatalError("Entity state '\(name)' doesn't exist")
+            assertionFailure("Entity state '\(name)' doesn't exist")
+            return
         }
 
         if newState === currentState {