From e10fd68f90453b96e832c7127520b2a32dc9aae7 Mon Sep 17 00:00:00 2001
From: Mariano Reingart <reingart@gmail.com>
Date: Sun, 19 Jan 2014 14:07:00 -0300
Subject: [PATCH] fixed issue 1839: catch exception if source code cannot be
 opened in the debugger

---
 applications/admin/controllers/debug.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/applications/admin/controllers/debug.py b/applications/admin/controllers/debug.py
index a33c0f8b..c5f9bd4f 100644
--- a/applications/admin/controllers/debug.py
+++ b/applications/admin/controllers/debug.py
@@ -54,9 +54,13 @@ def interact():
     filename = web_debugger.filename
     lineno = web_debugger.lineno
     if filename:
+        # prevent IOError 2 on some circuntances (EAFP instead of os.access)
+        try:
+            lines = open(filename).readlines()
+        except:
+            lines = ""
         lines = dict([(i + 1, l) for (i, l) in enumerate(
-            [l.strip("\n").strip("\r") for l
-             in open(filename).readlines()])])
+            [l.strip("\n").strip("\r") for l in lines])])
         filename = os.path.basename(filename)
     else:
         lines = {}