Do not validate libs location if not provided. Fixes btraceio#347

jbachorik · jbachorik · commit fe944285564a · 2018-08-26T19:55:41.000+02:00
diff --git a/src/share/classes/com/sun/btrace/agent/Main.java b/src/share/classes/com/sun/btrace/agent/Main.java
@@ -534,7 +534,8 @@ private static void addPreconfLibs(String libs) {
                 if (Files.exists(libFolder)) {
                     appendToBootClassPath(libFolder);
                     appendToSysClassPath(libFolder);
-                } else {
+                } else if (libs != null) {
+                    // for user provided libs config report error if the location does not exist
                     DebugSupport.warning("Invalid 'libs' configuration [" + libs + "]. " +
                                  "Path '" + libFolder.toAbsolutePath().toString() + "' does not exist.");
                 }
