From 2653e9634a78fd21483949a36e5f09af8bb2129f Mon Sep 17 00:00:00 2001
From: Alexander Kryklia <kryklia@gmail.com>
Date: Wed, 29 Jan 2014 14:24:24 +0200
Subject: [PATCH] Should not raise exception on empty answer.

---
 common/lib/capa/capa/responsetypes.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/common/lib/capa/capa/responsetypes.py b/common/lib/capa/capa/responsetypes.py
index dc0fbfeede..4b06369599 100644
--- a/common/lib/capa/capa/responsetypes.py
+++ b/common/lib/capa/capa/responsetypes.py
@@ -949,8 +949,6 @@ class NumericalResponse(LoncapaResponse):
         if self.range_tolerance:
             if isinstance(student_float, complex):
                 raise StudentInputError(_(u"You may not use complex numbers in range tolerance problems"))
-            if isnan(student_float):
-                raise general_exception
             boundaries = []
             for inclusion, answer in zip(self.inclusion, self.answer_range):
                 boundary = self.get_staff_ans(answer)