lib/async/task.rb in async-1.28.1 vs lib/async/task.rb in async-1.28.2

@@ -86,10 +86,10 @@
 			@fiber = make_fiber(&block)
 		end
 		
 		if Fiber.current.respond_to?(:backtrace)
 			def backtrace(*arguments)
-				@fiber.backtrace(*arguments)
+				@fiber&.backtrace(*arguments)
 			end
 		end
 		
 		def to_s
 			"\#<#{self.description} (#{@status})>"