Phantom column in lazy frame about polars HOT 2 CLOSED

(df1.join(df2, on="a")
    .select(pl.col("b").filter(pl.col("b") == pl.col("foo_right")))
    .collect()
)
# ComputeError: column 'foo' not available in 'DataFrame' with Schema:
# name: a, data type: Int64
# name: b, data type: Int64

(df1.join(df2, on="a")
    .select(pl.col("b").filter(pl.col("b") == pl.col("foo_right")))
    .collect(projection_pushdown=False)
)
# ColumnNotFoundError: foo_right

df1 = pl.DataFrame({"a": [1,2,3]}).lazy()
df2 = pl.DataFrame({"a": [1,2,3], "b": [4,5,6]}).lazy()
df1.join(df2, on="a").collect()