Added test case for issue #58. Provided by Jon Aslund.

--HG--
extra : transplant_source : gf6%EDL%83%96%40U%3Frv%B7i%FD%9F/%F6%18%9C

greentest/test__issue58.py

+import sys
+import gevent
+from gevent import wsgi
+from gevent import socket
+
+
+def error(env, start_response):
+    try:
+        raise ValueError('hello')
+    except Exception:
+        exc = sys.exc_info()
+        raise
+
+server = wsgi.WSGIServer(('', 0), error)
+server.start()
+conn = socket.create_connection(('127.0.0.1', server.server_port))
+conn.sendall('GET / HTTP/1.1\r\nConnection: close\r\n\r\n')
+with gevent.Timeout(0.1):
+    conn.makefile(bufsize=1).read()