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Re: [C++ Patch] PR 84540 ("[6/7/8 Regression] ICE with alignas in variadic template")
- From: Jason Merrill <jason at redhat dot com>
- To: Paolo Carlini <paolo dot carlini at oracle dot com>
- Cc: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- Date: Mon, 26 Feb 2018 12:51:17 -0500
- Subject: Re: [C++ Patch] PR 84540 ("[6/7/8 Regression] ICE with alignas in variadic template")
- Authentication-results: sourceware.org; auth=none
- References: <b01b0607-70ae-4371-9bb2-49d577d786fa@oracle.com>
OK.
On Mon, Feb 26, 2018 at 11:56 AM, Paolo Carlini
<paolo.carlini@oracle.com> wrote:
> Hi,
>
> this regression is an ICE on valid, and seems rather easy to analyze: both
> apply_late_template_attributes and tsubst_attributes don't appear to cope
> correctly with tsubst_attribute returning NULL_TREE. That, in turn, seems
> normal for an empty pack - as in the testcases - given the structure of the
> last part of the latter, handling PACK_EXPANSION_P (val). I'm finishing
> testing on x86_64-linux (in libstdc++-v3, so far so good).
>
> Thanks, Paolo.
>
> ///////////////////
>