[issue37388] unknown error handlers should be reported early

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:


New changeset 22eb689cf3de7972a2789db3ad01a86949508ab7 by Victor Stinner in branch 'master':
bpo-37388: Development mode check encoding and errors (GH-14341)
https://github.com/python/cpython/commit/22eb689cf3de7972a2789db3ad01a86949508ab7


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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37388>
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