Some environments, such as Jenkins, set the SIGPIPE handler to ignore, which gets inherited by the test suite, and yes(1) barfs as it checks for error conditions after print. Reset the SIGPIPE handler to a sane default state.
@@ -19,6 +19,9 @@ unset BZIP
unset XZ_OPT
unset XZ_DEFAULTS
+# Restore SIGPIPE to a sane default state.
+trap - PIPE
+
if [ "$(id -u)" = 0 ]; then
ASROOT=
elif which fakeroot >/dev/null; then