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To: python-list@python.org
From: Laura Creighton <lac@openend.se>
Subject: Re: How to debug TypeError: required field "lineno" missing from expr?
In-Reply-To: Message from Mark Lawrence <breamoreboy@yahoo.co.uk> of "Mon, 29 Jun 2015 02:14:43 +0100." <mmq666$1e7$1@ger.gmane.org>
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In a message of Mon, 29 Jun 2015 02:14:43 +0100, Mark Lawrence writes:
>Purely as an exercise I've been converting Grant Jenks' pypatt[1] from 
>2.7 to 3.4.  I've managed to sort out most of the required changes by 
>checking on what I can see with an AST pretty printer[2].  So it's 
>rather frustrating to have the compile stage throw the error given in 
>the subject line.

Are you trying to use ast.copy_location recursively somewhere?
http://bugs.python.org/issue3530  Maybe you have found something else
that doesn't work recursively?

Laura