investigation.md

gistfile1.txt

Attaching and calling dlopen fails:

```
(gdb) call (void*)dlopen(0, 2)                                                                                                       │>>> test test_exceptions failed -- Traceback (most recent call last):
Couldn't write extended state status: Bad address.                                                                                   │  File "/opt/_internal/cpython-3.8.13/lib/python3.8/test/test_exceptions.py", line 1256, in test_memory_error_in_PyErr_PrintEx
An error occurred while in a function called from GDB.                                                                               │    rc, out, err = script_helper.assert_python_failure("-c", code % i)
Evaluation of the expression containing the function                                                                                 │  File "/opt/_internal/cpython-3.8.13/lib/python3.8/test/support/script_helper.py", line 167, in assert_python_failure
(dlopen@plt) will be abandoned.                                                                                                      │    return _assert_python(False, *args, **env_vars)
When the function is done executing, GDB will silently stop.                                                                         │  File "/opt/_internal/cpython-3.8.13/lib/python3.8/test/support/script_helper.py", line 141, in _assert_python
(gdb)                                                           
```

Looks like there is some incompatibility with the kernel (check for instance https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=898048).

Looking at the last working run and the first failed one we can see:

Working:
```
Current runner version: '2.317.0'
Operating System
  Ubuntu
  22.04.4
  LTS
Runner Image
  Image: ubuntu-22.04
  Version: 20240804.1.0
  Included Software: https://github.com/actions/runner-images/blob/ubuntu22/20240804.1/images/ubuntu/Ubuntu2204-Readme.md
  Image Release: https://github.com/actions/runner-images/releases/tag/ubuntu22%2F20240804.1
```

failing:
```
Current runner version: '2.319.0'
Operating System
  Ubuntu
  22.04.4
  LTS
Runner Image
  Image: ubuntu-22.04
  Version: 20240811.1.0
  Included Software: https://github.com/actions/runner-images/blob/ubuntu22/20240811.1/images/ubuntu/Ubuntu2204-Readme.md
  Image Release: https://github.com/actions/runner-images/releases/tag/ubuntu22%2F20240811.1
Runner Image Provisioner
  2.0.374.1
```

Looks like this includes a kernel change, although very small:

https://github.com/actions/runner-images/releases/tag/ubuntu24%2F20240811.1

Check also hugsy/gef#449 and microsoft/debugpy#1480

https://launchpad.net/ubuntu/+source/linux-azure/6.8.0-1010.10

vs

https://launchpad.net/ubuntu/+source/linux-azure/6.8.0-1012.14