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Almost any problem which occurs when running a Lua module will be reported as "Script error" during program execution, ...
The message "Script error" only occurs when the test data triggers an invalid section of Lua code, so an untested module could contain many hidden bugs, only revealed when broader test data activates more areas of the source code, or uses more internal functions.
Wrapper scripts often use this command to run a program (either directly or through an interpreter or virtual machine) after setting environment variables or other configuration. By using exec , the resources used by the shell program do not need to stay in use after the program is started.
In unattended installation, it is assumed that there is no user to help mitigate errors. For instance, if the installation medium was faulty, the installer should fail the installation, as there is no user to fix the fault or replace the medium. Unattended installers may record errors in a computer log for later review.