| Issue |
170891
|
| Summary |
lldb: Crash in `RunCommandInterpreter` When Using `force_io_methods=True` in Python API (Regression in LLDB 21)
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
patryk4815
|
Starting with **LLDB 21**, calling `RunCommandInterpreter` crashes when
the debugger's output and error streams are initialized using
`lldb.SBFile.Create(..., force_io_methods=True)` in Python.
The same code works correctly on **LLDB 20**.
Removing `force_io_methods=True` (or explicitly setting it to `False`)
avoids the crash, indicating a regression in LLDB's handling of `SBFile`
IO redirection.
Probably regression is introduced by:\
https://github.com/llvm/llvm-project/commit/58279d1ee1b567e8ca793d6d1eb6e0f1d5e7279e
------------------------------------------------------------------------
## Affected Versions
- **LLDB 20** -- OK
- **LLDB 21** -- **CRASH** when invoking `RunCommandInterpreter`
Tested on:
- **Fedora 42** (lldb-20) --- works
- **Fedora 43** (lldb-21) --- crashes
Install using:
```bash
dnf install lldb -y
```
------------------------------------------------------------------------
## Minimal Reproduction
``` python
import lldb
import sys
lldb.SBDebugger.Initialize()
debugger = lldb.SBDebugger.Create()
debugger.SetOutputFile(lldb.SBFile.Create(sys.stdout, borrow=True, force_io_methods=True))
debugger.SetErrorFile(lldb.SBFile.Create(sys.stderr, borrow=True, force_io_methods=True))
# CRASHES on LLDB 21
debugger.RunCommandInterpreter(
True, False,
lldb.SBCommandInterpreterRunOptions(),
0, False, False
)
```
### Notes
- If `force_io_methods=True` is removed or set to `False`, **no crash occurs**.
- The crash happens immediately upon entering `RunCommandInterpreter`.
------------------------------------------------------------------------
## Expected Behavior
`RunCommandInterpreter` should run normally, as it does in LLDB 20.
------------------------------------------------------------------------
## Additional context
<img width="940" height="890" alt="Image" src="" />
`stdout` and `stderr` is null, crash SIGSEGV
![]()
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