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Subject: [Bug lto/106334] [13 Regression] lto -g ICE in
 dwarf2out_register_external_die at dwarf2out.cc:6072
Date: Mon, 08 Aug 2022 09:13:43 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106334

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:2a1448f2763a72c83e2ec496f78243a975b0d44e

commit r13-1987-g2a1448f2763a72c83e2ec496f78243a975b0d44e
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Aug 8 09:07:23 2022 +0200

    lto/106540 - fix LTO tree input wrt dwarf2out_register_external_die

    I've revisited the earlier two workarounds for
dwarf2out_register_external_die
    getting duplicate entries.  It turns out that r11-525-g03d90a20a1afcb
    added dref_queue pruning to lto_input_tree but decl reading uses that
    to stream in DECL_INITIAL even when in the middle of SCC streaming.
    When that SCC then gets thrown away we can end up with debug nodes
    registered which isn't supposed to happen.  The following adjusts
    the DECL_INITIAL streaming to go the in-SCC way, using lto_input_tree_1,
    since no SCCs are expected at this point, just refs.

            PR lto/106540
            PR lto/106334
            * dwarf2out.cc (dwarf2out_register_external_die): Restore
            original assert.
            * lto-streamer-in.cc (lto_read_tree_1): Use lto_input_tree_1
            to input DECL_INITIAL, avoiding to commit drefs.=