https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104076
Bug ID: 104076
Summary: bogus -Wdangling-pointer on a conditional
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
As reported in
https://gcc.gnu.org/pipermail/gcc-patches/2022-January/588620.html, the new
-Wdangling-pointer issues a false positive for the following test case:
$ cat t.C && g++ -S -Wall t.C
#include <initializer_list>
struct S1
{
S1 (int);
~S1 ();
};
struct S2 { S2 (std::initializer_list<S1>); };
S2 f1();
S2 f2(bool b)
{
return b ? f1() : S2{0};
}
t.C: In function ‘S2 f2(bool)’:
t.C:16:1: warning: dangling pointer to an unnamed temporary may be used
[-Wdangling-pointer=]
16 | }
| ^
t.C:15:25: note: unnamed temporary defined here
15 | return b ? f1() : S2{0};
| ^
t.C:16:1: warning: dangling pointer to an unnamed temporary may be used
[-Wdangling-pointer=]
16 | }
| ^
t.C:15:25: note: unnamed temporary defined here
15 | return b ? f1() : S2{0};
| ^
