mknos / PerlPowerTools / 9975228973

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rm: can't delete a filename including a dash

* A filename starting with a dash can be given as an argument like this: ./-o-
* The cp program seems to support this but rm does not (see below)
* I also tested a file called a-b
* Debugging showed that preprocessed_args is incorrectly ['-c','-p','-.','-1']
* Stepping through preprocess_options() revealed a regex on L146 which was not bound to the start of the string

%perl cp cp ./-cp.1
%perl rm ./-cp.1 
Unknown option: c
Unknown option: p
Unknown option: .
Unknown option: 1
Usage: rm [-fiPrRv] file ...

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376 of 493 relevant lines covered (76.27%)

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