[3.9] bpo-33065: Fix problem debugging user classes with __repr__ method (GH-24183) by miss-islington · Pull Request #24184

[3.9] bpo-33065: Fix problem debugging user classes with __repr__ method (GH-24183) by miss-islington · Pull Request #24184 · python/cpython

…ythonGH-24183)

If __repr__ uses instance attributes, as normal, and one steps
through the __init__ method, debugger may try to get repr before
the instance attributes exist.  reprlib.repr handles the error.
(cherry picked from commit 81f87bb)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>