# fixhunt regression fixture: ruff FURB129, ruff 0.17.1
# the fix labelled safe changes the program's output on this program
# before the fix: stdout "0:apple,0:banana,0:cherry", exit 0
# after the fix: stdout "2:apple", exit 0
# finding 2026-10-22T17-16-41-266Z-868l-ruff-FURB129/r1-p003; rule fired 1 time(s) before the fix

with open('tmp.txt', 'w') as f:
    f.write('apple\nbanana\ncherry')
with open('tmp.txt') as fp:
    trace = []
    for line in fp.readlines():  # Rule triggers here
        try:
            trace.append(f'{len(fp.readlines())}:{line.strip()}')
        except AttributeError as e:
            trace.append(f'ERR:{type(e).__name__}')
print(','.join(trace))