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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: dwz@sourceware.org
Subject: [Bug default/27578] --odr mode fails for a Libreoffice shared library
Date: Mon, 15 Mar 2021 12:27:22 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27578

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #1)
> With --no-import-optimize, we run instead into:
> ...
> $ dwz ./libvclplug_genlo.so.debug -o libvclplug_genlo.so.debug.z -lnone
> --odr --no-import-optimize
> dwz: /home/vries/dwz/dwz.git/dwz.c:12685: write_die: Assertion `IMPLIES
> (cu->cu_kind =3D=3D CU_PU, die_cu (refd)->cu_kind =3D=3D CU_PU)' failed.
> Aborted
> ...

Fixed by:
...
diff --git a/dwz.c b/dwz.c
index 54b4bda..fcbc3aa 100644
--- a/dwz.c
+++ b/dwz.c
@@ -8433,7 +8433,12 @@ merged_singleton (dw_die_ref die)
       {
       case ODR_DEF:
        if (res)
-         return NULL;
+         {
+           if (die_cu (res) =3D=3D die_cu (d))
+             continue;
+           else
+             return NULL;
+         }
        else
          res =3D d;
        break;
...

But that doesn't fix the assert reported in comment 0.

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