The problem you are trying to diagnose is due to a core perl bug in versions before 5.14. This is triggered by passing a tainted string to YAML::PP::Load, which is causing an infinite loop. On the test machines, it is eventually killed, which gives the status of 9 (SIGKILL).

Since YAML::PP is parsing the string, not using it in any unsafe way, you should be able to untaint the string before passing it to YAML::PP to avoid the bug. I've filed an issue on YAML::PP about this.

In reply to Re: Increase verbosity of "make test" by Haarg
in thread Increase verbosity of "make test" by bliako

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