https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117508
Bug ID: 117508
Summary: [12/13/14/15 Regression] Weird debug location info for
C++ std::initializer_list
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
#include <string>
struct X {
X(std::initializer_list<std::string>) { }
};
void test01() {
X x { "E", "E", "T", "T" };
return;
}
int main() {
test01();
return 0;
}
With GCC 11 debugging this works as expected, but since GCC 12.1 stepping into
test01 jumps around while constructing the initializer_list:
$ gdb -q -ex start -ex step -ex n -ex n -ex n -ex cont -ex q ./a.out
Reading symbols from ./a.out...
Temporary breakpoint 1 at 0x4023b2: file 83709.cc, line 13.
Starting program: /tmp/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Temporary breakpoint 1, main () at 83709.cc:13
13 test01();
test01 () at 83709.cc:10
10 }
8 X x { "E", "E", "T", "T" };
10 }
9 return;
Continuing.
[Inferior 1 (process 830655) exited normally]
We start on line 13 but after stepping into test01 we're on line 10 (the
closing brace of test01), then "next" takes us to line 8 where the
initializer_list is used, then "next" takes us back to line 10, then to line 9.
With GCC 11 it's great:
Temporary breakpoint 1, main () at 83709.cc:13
13 test01();
test01 () at 83709.cc:8
8 X x { "E", "E", "T", "T" };
9 return;
10 }
main () at 83709.cc:14
14 return 0;
Continuing.
[Inferior 1 (process 830849) exited normally]
