bug(tsort): when ulimit -v 1048576 and passing to ./tsort /dev/full panics

[HackingRepo]

Hi, uutils mainteners

our test confirmed tsort panic when using ulimit and tsort with /dev/full, it panics

relunsec@relunsec:~/software/coreutils/target/debug$ ./tsort /dev/full
memory allocation of 1073741824 bytes failed
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Aborted                    (core dumped) ./tsort /dev/full

while the gnu one

relunsec@relunsec:~/software/coreutils/target/debug$ gnutsort /dev/full
gnutsort: memory exhausted
relunsec@relunsec:~/software/coreutils/target/debug$ 

prints memory exhausted

[anastygnome]

@sylvestre closed by recent work, can be closed

[anastygnome]

@sylvestre please reopen, this affects all utils

#14480

[sylvestre]

let's open new issues :)