Jelle Zijlstra added the comment: I ran into this bug through Thrift-generated exception classes (also reported there as https://issues.apache.org/jira/browse/THRIFT-4002).
I've added a few potential solutions: - issue28603-listset.patch turns the seen set into a list if hashing fails. However, this adds a lot of complexity, especially in C, and because seen is changed halfway through the recursion, we may end up showing an exception twice. - issue28603-list.patch uses a list instead of a set for seen. This is theoretically slower, but in practice it seems unlikely that exception __cause__ and __context__ would nest deep enough for this to be an issue. - issue28603-ignore.patch takes a similar approach to Trundle's patch and just gives up when the value is not hashable. This means we lose cause/context information for these exceptions. I prefer issue28603-list.patch. ---------- nosy: +Jelle Zijlstra Added file: http://bugs.python.org/file45870/issue28603-list.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28603> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
