Unclear error message produced by "awk"

[BenjaminRodenberg]

This line of code

systemtests/silent_compose.sh

Line 10 in f9c5ac9

services=($(docker-compose ps | awk '{print $1}'| tail -n +3))

produces a very confusing and unclear error message:

https://travis-ci.org/precice/systemtests/jobs/621025195#L677-L711

In the end the test exits successfully (which is maybe even worse?).

[MakisH]

Is this the silent_compose.sh or the compare_results.sh? I think it's the latter.

[fsimonis]

Division by zero sounds very much like a problem in the comparison

systemtests/compare_results.sh

Lines 67 to 77 in f9c5ac9

	rel_max_difference=$( export max_diff_limit; export avg_diff_limit; echo "$filtered_diff" | awk 'function abs(v) {return v < 0 ? -v : v} { radius=NF/2;
	max_diff=0;
	sum=0;
	for(i = 1; i <= radius; i++) {
	if ($i != 0) {
	ind_diff= abs((($(i + radius)-$i)/$i ));
	sum += ind_diff;
	if (ind_diff > max_diff ) { max_diff = ind_diff }
	}
	}
	} END { diff=2*sum/( NR*NF ); if (diff > ENVIRON["avg_diff_limit"] || max_diff > ENVIRON["max_diff_limit"]) { print diff, max_diff }}')