fix: Address stack overflow error with tracing?

Author: kgilpin

lib/appmap/agent.rb

@@ -57,6 +57,12 @@ def info(msg)
       end
     end
 
+    def tracing_enabled?
+      return false unless @tracing
+
+      @tracing.enabled?
+    end
+
     # Used to start tracing, stop tracing, and record events.
     def tracing
       @tracing ||= Trace::Tracing.new

lib/appmap/hook/method.rb

@@ -83,7 +83,7 @@ def gettime
       end
 
       def trace?
-        return false unless AppMap.tracing.enabled?
+        return false unless AppMap.tracing_enabled?
         return false if Thread.current[HOOK_DISABLE_KEY]
         return false if hook_package&.shallow? && AppMap.tracing.last_package_for_current_thread == hook_package