sometimes breakpoint.path can be undefined

package.json

@@ -105,7 +105,7 @@
         "c9.ide.processlist": "#2b12cd1bdd",
         "c9.ide.run": "#8248b35394",
         "c9.ide.run.build": "#0598fff697",
-        "c9.ide.run.debug.xdebug": "#70aeb327c0",
+        "c9.ide.run.debug.xdebug": "#518f5a0c66",
         "c9.ide.save": "#9461acd953",
         "c9.ide.scm": "#930a9e6f00",
         "c9.ide.terminal.monitor": "#e26502f0df",