• Fix Cython incompatibility caused by the absence of underlying stack frames, which resulted in a ValueError during logging (#88).
• Fix possible RuntimeError when removing all handlers with logger.remove() due to thread-safety issue (#1183, thanks @jeremyk).
• Fix diagnose=True option of exception formatting not working as expected with Python 3.13 (#1235, thanks @etianen).
• Fix non-standard level names not fully compatible with logging.Formatter() (#1231, thanks @yechielb2000).
• Fix inability to display a literal "\" immediately before color markups (#988).
• Fix possible infinite recursion when an exception is raised from a __repr__ method decorated with logger.catch() (#1044).
• Improve performance of datetime formatting while logging messages (#1201, thanks @trim21).
• Reduce startup time in the presence of installed but unused IPython third-party library (#1001, thanks @zakstucke).