Corrections detailed in bbatsov#957 comments.

* Check buffer-file-name before cache entries.
* Add bug fix to CHANGELOG entries under bugs fixed.

CHANGELOG.md

@@ -27,6 +27,7 @@
 
 * [#871](https://github.com/bbatsov/projectile/issues/871): Stop advice for `compilation-find-file` to override other advices.
 * [#557](https://github.com/bbatsov/projectile/issues/557): stack overflow in `projectile-find-tag'.
+* [#957](https://github.com/bbatsov/projectile/pull/957): When opening a specified file from the terminal, do not error inside of `projectile-cache-current-file`.
 
 ## 0.13.0 (10/21/2015)
 

projectile.el

@@ -657,7 +657,7 @@ The cache is created both in memory and on the hard drive."
   "Add the currently visited file to the cache."
   (interactive)
   (let ((current-project (projectile-project-root)))
-    (when (and (gethash (projectile-project-root) projectile-projects-cache) (buffer-file-name (current-buffer)))
+    (when (and (buffer-file-name) (gethash (projectile-project-root) projectile-projects-cache))
       (let* ((abs-current-file (file-truename (buffer-file-name (current-buffer))))
             (current-file (file-relative-name abs-current-file current-project)))
       (unless (or (projectile-file-cached-p current-file current-project)