gh-85524: Raise "UnsupportedOperation" on FileIO.readall (#141214)
io.UnsupportedOperation is a subclass of OSError and recommended by io.IOBase for this case; matches other read methods on io.FileIO.
C
Cody Maloney committed
6f988b08d122e44848e89c04ad1e10c25d072cc7
Parent: 909f76d
Committed by GitHub <noreply@github.com>
on 11/12/2025, 9:37:48 AM