No error message when not enough space
Currently when there is not enough space for the torrent, it shows the error message only when started from terminal (in the command output). There is no other indication for the user: the torrent silently pauses short time after getting started with no indication why.
Relevant debug log
[2020-08-16 23:44:29.788] Couldn't preallocate file "/home/ignapk/Downloads/KNOPPIX_V8.6.1-2019-10-14-EN/KNOPPIX_V8.6.1-2019-10-14-EN.iso.part" (sparse, size: 4646207488): No space left on device
[2020-08-16 23:44:29.788] KNOPPIX_V8.6.1-2019-10-14-EN: tr_fdFileCheckout failed for "/home/ignapk/Downloads/KNOPPIX_V8.6.1-2019-10-14-EN/KNOPPIX_V8.6.1-2019-10-14-EN.iso.part": No space left on device
[2020-08-16 23:44:29.788] KNOPPIX_V8.6.1-2019-10-14-EN: No space left on device (/home/ignapk/Downloads/KNOPPIX_V8.6.1-2019-10-14-EN/KNOPPIX_V8.6.1-2019-10-14-EN.iso)
[2020-08-16 23:44:29.789] KNOPPIX_V8.6.1-2019-10-14-EN: Pausing
[2020-08-16 23:44:29.794] KNOPPIX_V8.6.1-2019-10-14-EN: write failed for "KNOPPIX_V8.6.1-2019-10-14-EN/KNOPPIX_V8.6.1-2019-10-14-EN.iso": No space left on device
[2020-08-16 23:44:29.794] Couldn't save temporary file "/home/ignapk/.config/fragments/resume/8dcb18c22d1877dde2e61c916dac406220521bb4.resume.tmp.3QgXwf": No space left on device
[2020-08-16 23:44:29.794] KNOPPIX_V8.6.1-2019-10-14-EN: Unable to save resume file: No space left on device