BUG: UnboundLocalError("local variable 'v' referenced before assignme… #5815

Job	Run time
pytest on windows	7m 2s
Check code style issues	33s
pytest on 3.8 (crypto-lib: cryptography)	5m 47s
Build & verify package	10s
pytest on 3.9 (crypto-lib: cryptography)	5m 41s
pytest on 3.10 (crypto-lib: cryptography)	5m 32s
pytest on 3.11 (crypto-lib: cryptography)	5m 10s
pytest on 3.12 (crypto-lib: cryptography)	7m 7s
pytest on 3.13 (crypto-lib: cryptography)	6m 30s
pytest on 3.8 (crypto-lib: pycryptodome)	5m 56s
pytest on 3.8 (crypto-lib: none)	6m 5s
Combine & check coverage.	12s
	55m 45s

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