SF bug [#455775] float parsing discrepancy.
PyTokenizer_Get:  error if exponent contains no digits (3e, 2.0e+, ...).
diff --git a/Lib/test/test_compile.py b/Lib/test/test_compile.py
index 17d3500..0276ba6 100644
--- a/Lib/test/test_compile.py
+++ b/Lib/test/test_compile.py
@@ -50,3 +50,18 @@
     raise TestFailed, "non-default args after default"
 except SyntaxError:
     pass
+
+if verbose:
+    print "testing bad float literals"
+
+def expect_error(s):
+    try:
+        eval(s)
+        raise TestFailed("%r accepted" % s)
+    except SyntaxError:
+        pass
+
+expect_error("2e")
+expect_error("2.0e+")
+expect_error("1e-")
+expect_error("3-4e/21")