diff --git a/lib/less/environment/environment.js b/lib/less/environment/environment.js
index be654da9..57366c1a 100644
--- a/lib/less/environment/environment.js
+++ b/lib/less/environment/environment.js
@@ -1,3 +1,4 @@
+var logger = require("../logger");
 var environment = function(externalEnvironment, fileManagers) {
     this.fileManagers = fileManagers || [];
     externalEnvironment = externalEnvironment || {};
@@ -18,6 +19,14 @@ var environment = function(externalEnvironment, fileManagers) {
 };
 
 environment.prototype.getFileManager = function (filename, currentDirectory, options, environment, isSync) {
+
+    if (!filename) {
+        logger.warn("getFileManager called with no filename.. Please report this issue. continuing.");
+    }
+    if (currentDirectory == null) {
+        logger.warn("getFileManager called with null directory.. Please report this issue. continuing.");
+    }
+
     var fileManagers = this.fileManagers;
     if (options.pluginManager) {
         fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers());