[issue26623] JSON encode: more informative error

[Roundup Robot]

Roundup Robot added the comment:

New changeset cb1ad434f10e by Serhiy Storchaka in branch 'default':
Issue #26623: TypeError message for JSON unserializible object now contains
https://hg.python.org/cpython/rev/cb1ad434f10e

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26623>
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