do not crash if Assembly has no Location

Author: Oscar Morante

Clojure/Clojure/Lib/RT.cs

@@ -3576,16 +3576,25 @@ public static IEnumerable<string> GetFindFilePaths()
             return GetFindFilePathsRaw().Distinct();
         }
 
+        static string GetAssemblyPath(Assembly assy) {
+            if (assy == null || String.IsNullOrEmpty(assy.Location)) {
+                return null;
+            }
+
+            return Path.GetDirectoryName(assy.Location);
+        }
+
         static IEnumerable<string> GetFindFilePathsRaw()
         {
             yield return System.Environment.CurrentDirectory;
             yield return Path.Combine(System.Environment.CurrentDirectory, "bin");
             yield return Directory.GetCurrentDirectory();
-            yield return Path.GetDirectoryName(typeof(RT).Assembly.Location);
 
-            Assembly assy = Assembly.GetEntryAssembly();
-            if ( assy != null )
-                yield return Path.GetDirectoryName(assy.Location);
+            string assyPath;
+            assyPath = GetAssemblyPath(typeof(RT).Assembly);
+            if (assyPath != null) yield return assyPath;
+            assyPath = GetAssemblyPath(Assembly.GetEntryAssembly());
+            if (assyPath != null) yield return assyPath;
 
             string rawpaths = (string)System.Environment.GetEnvironmentVariable(ClojureLoadPathString);
             if (rawpaths == null)