21491: catching the IndexError instead

sagemath · Nov 23, 2016 · 347aa90 · 347aa90
1 parent 27948e8
commit 347aa90
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/src/sage/geometry/polyhedron/base.py b/src/sage/geometry/polyhedron/base.py
@@ -4258,8 +4258,13 @@ def integral_points_count(self,verbose=False):
                 err = ":\n" + err
             raise RuntimeError("LattE integrale failed (exit code {}) to execute {}".format(ret_code, ' '.join(args)) + err.strip())
 
-        with open(SAGE_TMP+'/numOfLatticePoints', 'r') as f:
-            return Integer(f.read())
+        try:
+            return Integer(ans.splitlines()[-1])
+        except IndexError:
+            # opening a file is slow (30e-6s), so we read the file
+            # numOfLatticePoints only in case of a IndexError above
+            with open(SAGE_TMP+'/numOfLatticePoints', 'r') as f:
+                return Integer(f.read())
 
     def integral_points(self, threshold=100000):
         r"""