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Re: In pt.c, find_parameter_packs_r, should TYPE_P(t) assure TYPE_CONTEXT(t)?

From: Jason Merrill <jason at redhat dot com>
To: Larry Evans <cppljevans at suddenlink dot net>
Cc: gcc at gcc dot gnu dot org
Date: Mon, 03 Aug 2009 15:39:39 -0400
Subject: Re: In pt.c, find_parameter_packs_r, should TYPE_P(t) assure TYPE_CONTEXT(t)?
Newsgroups: gmane.comp.gcc.devel
References: <h56k9l$5vg$1@ger.gmane.org>

On 08/03/2009 08:32 AM, Larry Evans wrote:

While trying to track down the cause of:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40092

I encountered what may be an error. In pt.c around
line 2493, there's this:

if (TYPE_P (t) )
cp_walk_tree (&TYPE_CONTEXT (t), &find_parameter_packs_r, ppd, ppd->visited);


However, gdb shows TYPE_CONTEXT(t) is the constant, 0, during
compile of src.cpp:

That's not a problem; if the tree passed to walk_tree_1 is null, it just returns.

Jason

References:
- In pt.c, find_parameter_packs_r, should TYPE_P(t) assure TYPE_CONTEXT(t)?
  - From: Larry Evans

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