Program without source code

["Nelson A. de Oliveira" <n3150nao@bol.com.br>]

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Hi Mentors

Is it allowed to release a package that don't have the source codes
available?
For example, program XYZ just have a binary of it, but no source code.

I know that if the program has a critical bug, it won't be possible to
correct it, since there is no source code available.

Thank you
Nelson
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