# add file to zip twice, making duplicate names
return 1
arguments -- testfile.zip   add_file testfile.txt testfile.txt 0 -1   add_file testfile.txt testfile.txt 0 -1
file testfile.txt testfile.txt
file testfile.zip {} testfile.zip
stderr
can't add file 'testfile.txt': File already exists
end-of-inline-data