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Sarj Sarj Sarj Standards

no-loguru-exc-info

Loguru exc_info=True adds a field rather than retaining the exception traceback.

SARJ508 Rule source Tests Catalog JSON

Why

Loguru accepts logging keyword arguments as structured fields. The standard logging exc_info=True argument therefore does not attach an exception, leaving failure logs without their traceback.

Fix

Use logger.opt(exception=True) or logger.exception(...) when reporting the active exception.

Examples

Before — flagged A standard logging argument does not capture the exception
app/service.py
from loguru import logger


try:
    int("invalid")
except ValueError:
    logger.warning("failed", exc_info=True)
After — preferred Loguru captures the exception through opt
app/service.py
from loguru import logger


try:
    int("invalid")
except ValueError:
    logger.opt(exception=True).warning("failed")