Allow failure in "nightly" Python until we fix it

[myint]

No description provided.

[myint]

It looks like the CPython 3.7 failure is related to a change in the AST. The docstring is no longer in node.body.

python/cpython#46

We can mostly replace our getDocstring(node.body[0]) call with node.docstring. But I'm not sure how to get the line number of the docstring anymore. node.lineno is close, but not quite the line number of the docstring.

pyflakes/pyflakes/checker.py

Line 873 in 074c21d

(docstring, node_lineno) = self.getDocstring(node.body[0])

diff --git a/pyflakes/checker.py b/pyflakes/checker.py
index 382574e..2c19533 100644
--- a/pyflakes/checker.py
+++ b/pyflakes/checker.py
@@ -870,7 +870,11 @@ class Checker(object):

     def handleDoctests(self, node):
         try:
-            (docstring, node_lineno) = self.getDocstring(node.body[0])
+            if hasattr(node, 'docstring'):
+                docstring = node.docstring
+                node_lineno = ???  # TODO
+            else:
+                (docstring, node_lineno) = self.getDocstring(node.body[0])
             examples = docstring and self._getDoctestExamples(docstring)
         except (ValueError, IndexError):
             # e.g. line 6 of the docstring for <string> has inconsistent

[myint]

@methane After the change in python/cpython#46, is there still a simple way to get the line number of a docstring? It used to be something like:

node.body[0].value.lineno

Thanks