https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104082
Bug ID: 104082
Summary: Wdangling-pointer: 2 * false positive ?
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C++ code:
$ more bug790.cc
int *metricp;
void s88() {
int distance;
metricp = &distance;
}
$
Does this with recent gcc trunk:
$ /home/dcb/gcc/results/bin/gcc -c -O2 -D_FORTIFY_SOURCE=2 -Wall bug790.cc
bug790.cc: In function ‘void s88()’:
bug790.cc:4:11: warning: storing the address of local variable ‘distance’ in
‘metricp’ [-Wdangling-pointer=]
4 | metricp = &distance;
| ~~~~~~~~^~~~~~~~~~~
bug790.cc:3:7: note: ‘distance’ declared here
3 | int distance;
| ^~~~~~~~
bug790.cc:1:6: note: ‘metricp’ declared here
1 | int *metricp;
| ^~~~~~~
bug790.cc:4:11: warning: storing the address of local variable ‘distance’ in
‘metricp’ [-Wdangling-pointer=]
4 | metricp = &distance;
| ~~~~~~~~^~~~~~~~~~~
bug790.cc:3:7: note: ‘distance’ declared here
3 | int distance;
| ^~~~~~~~
bug790.cc:1:6: note: ‘metricp’ declared here
1 | int *metricp;
| ^~~~~~~
$
I've no idea why the warning is generated, the code looks legal to me
and I've no idea why the warning is duplicated.
