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A comment on Bash Debugging.
Had to change it to drop the parantheses, then it worked, like this
trap 'read -p "[${BASH_SOURCE:-}:${LINENO:-}] ${BASH_COMMAND:-}"' DEBUG
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Had to change it to drop the parantheses, then it worked, like this
trap 'read -p "[${BASH_SOURCE:-}:${LINENO:-}] ${BASH_COMMAND:-}"' DEBUG