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From: "awdawdawdawq123123 at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/98508] New: Sanitizer disable -Wall and -Wextra
Date: Mon, 04 Jan 2021 08:31:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98508

            Bug ID: 98508
           Summary: Sanitizer disable -Wall and -Wextra
           Product: gcc
           Version: 10.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: awdawdawdawq123123 at gmx dot de
  Target Milestone: ---

Created attachment 49871
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D49871&action=3Dedit
source file

1.cpp:
```
struct S
{
    int a;
};

int main()
{
    S s =3D S(s);
}
```

Compiling this by calling=20

g++ -Wall -Wextra  1.cpp

yields the warning:
```
1.cpp: In function =E2=80=98int main()=E2=80=99:
1.cpp:8:7: warning: =E2=80=98s=E2=80=99 is used uninitialized in this funct=
ion
[-Wuninitialized]
    8 |     S s =3D S(s);
      |       ^
```
as expected. But when additionally using Sanitizers the call

g++ -Wall -Wextra  -fsanitize=3Daddress,undefined 1.cpp

yields no warnings.=20
Attached is the source file.=