v10.9.1

Fixed

• Fixed a crash (SIGABRT via std::terminate) that could occur when a
  file-backed {class}pikepdf.Pdf was deallocated while a Python exception was
  already propagating -- for example when pikepdf.open(filename) appears as a
  transient element of a list/tuple literal whose later element raises. Opening
  from a filename closes the file in the input source destructor, which calls
  back into Python; with an exception already in flight that call raised an error
  that escaped the destructor. The in-flight exception is now preserved and
  propagates normally. (#732) Added a guard for a likely non-reproducible related
  case with DecimalPrecision.