If the file exists and contains an empty line, an exception will be raised from checking if alias exists in this line: https://github.com/OpenZeppelin/nile/blob/0c9bf0e2c2f0035fdb3349d2603557f32d5e075f/src/nile/core/declare.py#L22 The issue occurs from trying to call `normalize_number` on an empty hash.
If the file exists and contains an empty line, an exception will be raised from checking if alias exists in this line:
nile/src/nile/core/declare.py
Line 22 in 0c9bf0e
The issue occurs from trying to call
normalize_numberon an empty hash.