Comment # 4 on bug 911202 from Uwe Geuder

The "does not gave feedback part" is very valid. If a certificate has wrong
format it will be *silently* ignored, which is painful for the admin, because
he has no clue that something went wrong. According to old Linux tradition
programs are silent when the operation succeeds, but in case of an error there
should be an error message. See
https://bugzilla.opensuse.org/show_bug.cgi?id=936709 for an example.

If I read the scripts correctly, the problem happens inside the /usr/bin/trust
binary, which has no documentation.