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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/105346] -Wno-free-nonheap-object false positive (on
 Bison-generated grammar code)
Date: Fri, 22 Apr 2022 12:21:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105346

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2022-04-22

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It doesn't diagnose a simple testcase like

#include <stdlib.h>
void bar (void *);
void foo (int n)
{
  int a[100];
  int *p =3D a;
  if (n > 100)
    p =3D malloc (n*sizeof(int));
  bar (p);
  if (p !=3D a)
    free (p);
}

so maybe you can provide preprocessed source of the TU that diagnoses such a
case in a more complicated setting?=