[issue30682] f-string assert is too restrictive

[Eric V. Smith]

New submission from Eric V. Smith:

>>> eval("f'\\\n'")
python: Python/ast.c:4906: FstringParser_ConcatFstring: Assertion `!state->last_str || PyUnicode_GET_LENGTH(state->last_str) != 0' failed.
[2]    12810 abort (core dumped)  ./python

The problem is that some literal strings are zero length. The assert can be deleted.

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assignee: eric.smith
components: Interpreter Core
messages: 296166
nosy: eric.smith, ned.deily, serhiy.storchaka
priority: normal
severity: normal
status: open
title: f-string assert is too restrictive
versions: Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30682>
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