https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109064
Bug ID: 109064
Summary: Maximum recursion depth exceeded in std::shared_ptr
xmethod
Product: gcc
Version: 12.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: ks1322 at gmail dot com
Target Milestone: ---
Based on
https://stackoverflow.com/questions/75652764/gdb-fails-with-python-exception-class-recursionerror-maximum-recursion-dep
Seems that trying to print unique() and use_count() in GDB for std::shared_ptr
causes infinite recursion in Python xmethods.
For this code:
```
#include <iostream>
#include <memory>
int main() {
auto ptr = std::make_shared<int>(0);
std::cout << ptr.use_count() << "\n";
return 0;
}
```
Buid with:
```
g++ -g main.cc
```
Results in "maximum recursion depth exceeded" error
```
$ gdb -batch -ex "b 7" -ex r -ex "p ptr.use_count()" -ex "p ptr.unique()" a.out
Breakpoint 1 at 0x40122f: file /tmp/main.cc, line 7.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
1
Breakpoint 1, main () at /tmp/main.cc:7
7 return 0;
Python Exception <class 'RecursionError'>: maximum recursion depth exceeded
Error while looking for matching xmethod workers defined in Python.
Python Exception <class 'RecursionError'>: maximum recursion depth exceeded
Error while looking for matching xmethod workers defined in Python.
```
As a workaround xmethods can be disabled with
```
(gdb) disable xmethod
```
