Description of the issue

Two empty RangeIndex objects with same starts and stops will have a non-null intersection.

Code example

import pandas as pd

# Two empty rangeindexes
a = pd.RangeIndex(0, 0)
b = pd.RangeIndex(0, 0)

# Also empty but different start and stops
c = pd.RangeIndex(1, 1)

# OK, this returns an empty Index
print(a.intersection(c))

# Strangely, this one returns an index of [0, 1[
print(a.intersection(b))

Expected output

RangeIndex(start=0, stop=0, step=1)
RangeIndex(start=0, stop=0, step=1)

Output

RangeIndex(start=0, stop=0, step=1)
RangeIndex(start=0, stop=1, step=1)

Output of pd.show_versions()

Not the most recent version of Pandas, but I believe this behaviour is still present in the master branch
after browsing the code. If somebody could confirm.