fix: Removes execution fatalErrors

Author: NeedleInAJayStack

Sources/GraphQL/Execution/Execute.swift

@@ -796,7 +796,7 @@ func completeValueCatchingError(
             result: result
         ).flatMapError { error -> EventLoopFuture<Any?> in
             guard let error = error as? GraphQLError else {
-                fatalError()
+                return exeContext.eventLoopGroup.next().makeFailedFuture(error)
             }
             exeContext.append(error: error)
             return exeContext.eventLoopGroup.next().makeSucceededFuture(nil)
@@ -809,7 +809,7 @@ func completeValueCatchingError(
         exeContext.append(error: error)
         return exeContext.eventLoopGroup.next().makeSucceededFuture(nil)
     } catch {
-        fatalError()
+        return exeContext.eventLoopGroup.next().makeFailedFuture(error)
     }
 }
 

Sources/GraphQL/Map/Map.swift

@@ -663,7 +663,13 @@ extension Map : Codable {
 
         switch self {
         case .undefined:
-            fatalError("undefined values should have been excluded from encoding")
+            throw EncodingError.invalidValue(
+                self,
+                EncodingError.Context(
+                    codingPath: [],
+                    debugDescription: "undefined values should have been excluded from encoding"
+                )
+            )
         case .null:
             try container.encodeNil()
         case let .bool(value):

Sources/GraphQL/Map/MapSerialization.swift

@@ -35,7 +35,13 @@ public struct MapSerialization {
     static func object(with map: Map) throws -> NSObject {
         switch map {
         case .undefined:
-            fatalError("undefined values should have been excluded from serialization")
+            throw EncodingError.invalidValue(
+                self,
+                EncodingError.Context(
+                    codingPath: [],
+                    debugDescription: "undefined values should have been excluded from serialization"
+                )
+            )
         case .null:
             return NSNull()
         case let .bool(value):