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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug analyzer/104274] FAIL: gcc.dg/analyzer/pr97029.c (test for
 excess errors)
Date: Thu, 10 Feb 2022 23:59:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104274

--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
This patch seems to fix it, but I'm not yet sure if it's the correct fix.

diff --git a/gcc/analyzer/region-model.cc b/gcc/analyzer/region-model.cc
index f8f19769258..9b42e9e983d 100644
--- a/gcc/analyzer/region-model.cc
+++ b/gcc/analyzer/region-model.cc
@@ -843,6 +843,10 @@ region_model::check_for_poison (const svalue *sval,

   if (const poisoned_svalue *poisoned_sval =3D sval->dyn_cast_poisoned_sva=
lue
())
     {
+      /* Ignore empty types.  */
+      if (sval->get_type () && is_empty_type (sval->get_type ()))
+       return sval;
+
       /* If we have an SSA name for a temporary, we don't want to print
         '<unknown>'.
         Poisoned values are shared by type, and so we can't reconstruct=