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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/91706] [9/10 Regression] ICE: tree check: expected class
 'type', have 'exceptional' (error_mark) in equate_type_number_to_die, at
 dwarf2out.c:5782
Date: Tue, 08 Jun 2021 21:20:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D91706

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[9/10/11/12 Regression]     |[9/10 Regression] ICE: tree
                   |ICE: tree check: expected   |check: expected class
                   |class 'type', have          |'type', have 'exceptional'
                   |'exceptional' (error_mark)  |(error_mark) in
                   |in                          |equate_type_number_to_die,
                   |equate_type_number_to_die,  |at dwarf2out.c:5782
                   |at dwarf2out.c:5782         |

--- Comment #13 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 11.2/12 so far.  Is there interest in fixing this on the 9/10
branches?=