feature_notifications.py cirrus test failure: IndexError: string index out of range #21683
Description
self.expect_wallet_notify([(bump2, blockheight2, blockhash2), (tx2, -1, UNCONFIRMED_HASH_STRING)])
File "/tmp/cirrus-ci-build/ci/scratch/build/bitcoin-i686-pc-linux-gnu/
test/functional/feature_notifications.py", line 172, in expect_wallet_notify
assert_equal(text[-1], '\n')
IndexError: string index out of range
Could not reproduce locally.
This is a recent change (March 15, 2021) from 06e1fb0 in #21141.