Dart
Dart
HTML Canvas
HTML Canvas
Redis
Redis
Bash
Bash
JavaScript
JavaScript
Bash
Bash

Trap errors

trap 'echo Error at about $LINENO' ERR

or

traperr() {
    echo "ERROR: ${BASH\_SOURCE[1]} at about ${BASH\_LINENO[0]}"
}
set -o errtrace
trap traperr ERR
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