PR Summary

When processing a file (implicitly or via -File), it looks at the remainings args and constructs parameters to pass to the pipeline. When the first character is a -, it assumes it's a parameter and uses the remainder to be the name of the parameter. If it's a single dash, it ends up being an empty string for the name. This causes the parameter binder to throw which then causes the console host to crash.

Fix is to detect that it's a single dash and pass that as an unnamed parameter which gets handled correctly.

PR Context

Fix #9362

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