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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/96935] [9/10/11 Regression] ICE in subspan, at
 input.h:69
Date: Wed, 16 Sep 2020 02:49:31 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96935

--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r269125.  Use -O to reproduce.

Bizarrely, it goes away when -Wall is in effect!=