Bug report
Bug description:
An error is raised for the following valid test cases using the newly introduced ignorechars parameter
import base64 assert base64.b64decode(b'/----', altchars=b'-+', ignorechars=b'/') == b'\xfb\xef\xbe' assert base64.b64decode(b'+----', altchars=b'/-', ignorechars=b'+') == b'\xff\xff\xff'
For both we get:
binascii.Error: Invalid base64-encoded string: number of data characters (5) cannot be 1 more than a multiple of 4
In both cases, the leading byte should be ignored thus giving a 4 bytes valid input.
CPython versions tested on:
CPython main branch
Operating systems tested on:
macOS