Simon McVittie d7cdde5d34 libtest-core: On failure, make it clearer what has happened
If we fail as a result of `set -x`, It's often not completely obvious
which command failed or how. Use a trap on ERR to show the command that
failed, and its exit status.

Signed-off-by: Simon McVittie <smcv@collabora.com>
2021-06-18 09:49:53 +01:00
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