🕵️ curl: Parallel upload hangs curl if upload file not found

Attempting to upload (-T) a not found file with parallel (-Z) flag present, will cause curl to get stuck and never terminate, potentially stalling scripts that make use of this particular flags. curl -T blabla-notexists -Z upload.example.com www.google.com www.cnn.com www.apple.com Same issue occurs if using -Z or --parallel flags. $ curl -T blabla-notexists -Z upload.example.com www.google.com www.cnn.com www.apple.com curl: Can't open 'blabla-notexists'! curl: try 'curl --help' or 'curl --manual' for more information DL% UL% Dled Uled Xfers Live Qd Total Current Left Speed -- -- 0 0 1 0 1 --:--:-- 0:00:01 --:--:-- 0 curl: Can't open 'blabla-notexists'! curl: try 'curl --help' or 'curl --manual' for more information curl: Can't open 'blabla-notexists'! curl: try 'curl --help' or 'curl --manual' for more information curl: Can't open 'blabla-notexists'! curl: try 'curl --help' or 'curl --manual' for more information curl: Can't open 'blabla-notexists'! curl: try 'curl --help' or 'curl --manual' for more information curl: Can't open 'blabla-notexists'! curl: try 'curl --help' or 'curl --manual' for more information curl: Can't open 'blabla-notexists'! curl: try 'curl --help' or 'curl --manual' for more information curl: Can't open 'blabla-notexists'! curl: try 'curl --help' or 'curl --manual' for more information curl: Can't open 'blabla-notexists'! curl: try 'curl --help' or 'curl --manual' for more information curl: Can't open... ...