test: the coloring algo is for non-directed graphs only!

5 jobs for master in 2 minutes and 42 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Build
failed build #245771

00:02:42

 
  Release
skipped release #245774
skipped simca-docker #245772
skipped test_opam_test #245773
allowed to fail
 
  Deploy
skipped pages #245775
 
Name Stage Failure
failed
build Build
../Makefile.inc:19: recipe for target 'ring.cmxs' failed
make[2]: Leaving directory '/builds/verimag/synchrone/sasa/test/coloring'
Makefile:3: recipe for target 'test' failed
make[1]: *** [test] Error 2
make[1]: Leaving directory '/builds/verimag/synchrone/sasa/test'
make: *** [test] Error 2
Makefile.sasa:9: recipe for target 'test' failed
Cleaning up file based variables
ERROR: Job failed: exit code 1