https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91049
Bug ID: 91049
Summary: wrong location in -Wreturn-local-addr for a return
throw
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The location of the underlining in the warning for the test case below is
wrong: it should point at the &i:
$ cat a.C && gcc -O2 -S -Wall a.C
struct X { };
void* f (int i)
{
X x;
return i ?
&i :
throw x;
}
a.C: In function ‘void* f(int)’:
a.C:8:16: warning: function may return address of local variable
[-Wreturn-local-addr]
8 | throw x;
| ^
a.C:3:14: note: declared here
3 | void* f (int i)
| ~~~~^
Clang gets it right:
a.C:7:11: warning: address of stack memory associated with parameter 'i'
returned [-Wreturn-stack-address]
&i :
^
