Turn on fatal error tracebacks without code changes.
Section: Tracebacks and Exceptions
Enable faulthandler from CLI
bash
bash
python -X faulthandler app.pyLearn the surrounding workflow
Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.
Related commands
Same sheet · prioritizing Tracebacks and Exceptions
Enable faulthandler
Print Python tracebacks on fatal errors like segfaults.
Print the current exception traceback
Dump the active exception traceback in an except block.
Format exception as a string
Capture traceback output for logs or APIs.
Get exception info tuple
Access exception type, value, and traceback explicitly.
Preserve context with raise from
Chain exceptions to keep original failure context.