Don't attempt to do anything for methods that are passed a non-string…

… as the first argument, such as fstat, read, etc.

lib/FsPlusGit.js

@@ -104,6 +104,11 @@ var FsPlusGit = module.exports = function FsPlusGit(options) {
                     return fsPropertyValue.apply(fs, args);
                 }
 
+                // Don't try to implement fstat, read etc.
+                if (typeof path !== 'string') {
+                    return proxyToWrappedFs();
+                }
+
                 // Absolutify and normalize path:
                 var absolutePath = Path.resolve(process.cwd(), path),
                     matchGitRepoInPath = typeof absolutePath === 'string' && absolutePath.match(/^(.*?\/[^\/]*\.git)(\/gitFakeFs($|\/.*$)|$)/);