tests the fix for 'float64' in RNNs, wastes memory and breaks when warn_float64=raise

theano/tests/test_raise_on_float64.py

+from __future__ import absolute_import, print_function, division
+
+__author__ = "deepworx"
+__contact__ = "deepworx@GitHub"
+
+import unittest
+import theano, numpy
+
+class RaiseOnFloat64(unittest.TestCase):
+    s = theano.tensor.lscalar()
+    a = theano.tensor.alloc(numpy.asarray(5, dtype='float32'), s, s)
+    orig = theano.config.warn_float64
+    theano.config.warn_float64 = "raise"
+    try:
+        f = theano.function([s], a.sum())
+        theano.printing.debugprint(f)
+        f(5)
+    finally:
+        theano.config.warn_float64 = orig
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