MAINT: add back in errstate ignore in FloatingFormat

2 files changed, 9 insertions, 3 deletions

diff --git a/numpy/core/arrayprint.py b/numpy/core/arrayprint.py
index 0030e0ef1..9174328bf 100644
--- a/numpy/core/arrayprint.py
+++ b/numpy/core/arrayprint.py
@@ -721,9 +721,10 @@ class FloatingFormat(object):
         if len(abs_non_zero) != 0:
             max_val = np.max(abs_non_zero)
             min_val = np.min(abs_non_zero)
-            if max_val >= 1.e8 or (not self.suppress_small and
-                    (min_val < 0.0001 or max_val/min_val > 1000.)):
-                self.exp_format = True
+            with errstate(over='ignore'):  # division can overflow
+                if max_val >= 1.e8 or (not self.suppress_small and
+                        (min_val < 0.0001 or max_val/min_val > 1000.)):
+                    self.exp_format = True
 
         # do a first pass of printing all the numbers, to determine sizes
         if len(finite_vals) == 0:
diff --git a/numpy/core/tests/test_arrayprint.py b/numpy/core/tests/test_arrayprint.py
index 67387957d..39de1b970 100644
--- a/numpy/core/tests/test_arrayprint.py
+++ b/numpy/core/tests/test_arrayprint.py
@@ -354,6 +354,11 @@ class TestPrintOptions(object):
 
         assert_raises(TypeError, np.set_printoptions, wrongarg=True)
 
+    def test_float_overflow_nowarn(self):
+        # make sure internal computations in FloatingFormat don't
+        # warn about overflow
+        repr(np.array([1e4, 0.1], dtype='f2'))
+
     def test_sign_spacing_structured(self):
         a = np.ones(2, dtype='f,f')
         assert_equal(repr(a), "array([(1., 1.), (1., 1.)],\n"