From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 7363C3857C48; Wed, 10 Mar 2021 19:26:02 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7363C3857C48
From: "janekb04 at icloud dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/99527] New: ICE when using nested lambdas
Date: Wed, 10 Mar 2021 19:26:02 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: janekb04 at icloud dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
 attachments.created
Message-ID: <bug-99527-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Wed, 10 Mar 2021 19:26:02 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99527

            Bug ID: 99527
           Summary: ICE when using nested lambdas
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: janekb04 at icloud dot com
  Target Milestone: ---

Created attachment 50355
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D50355&action=3Dedit
The code that causes the error, the preprocessed version of the code and the
compiler output

When the code in the attachment is compiled it causes an Internal Compiler
Error. The code is also available on godbolt: https://godbolt.org/z/vn35js .

The code doesn't emit any warning using -Wall -Wextra -Wpedantic.
-fno-strict-aliasing -fwrapv don't seem to have any effect.

All the information about the compiler version and environment is available=
 on
godbolt. For clarity, here is the version and flags.
version: g++ (Compiler-Explorer-Build) 11.0.1 20210309 (experimental)
Copyright (C) 2021 Free Software Foundation, Inc.
flags: -std=3Dc++20

The code that causes the error, the preprocessed version of the code and the
compiler output are in the attachment.

Not sure if it is relevant, but I will say just in case that the code is ba=
sed
on a technique I discussed here:
https://janbielak.com/index.php/2021/01/15/anonymous-types-in-c/ .=