cs50/2017/x/find/less: `clang -std=c11 -o sort sort.c helpers.c -lcs50 -lm` returns 1

[denis-osipov]

Can't pass check of Find problem solution in Pset3: check50 cs50/2017/x/find/less gives

:( helpers.c compiles.
    expected exit code 0, not 1
    running clang -std=c11 -o sort sort.c helpers.c -lcs50 -lm...
    checking that program exited with status 0...

Check report

I put sort.c in my cs50.io folder and clang works fine:

~/workspace/pset3/find/ $ clang -std=c11 -o sort sort.c helpers.c -lcs50 -lm
~/workspace/pset3/find/ $ echo $?
0