--source-type:"script" should given an error about an unknown argument (probably)

[shashank-13]

I was trying to transpile js files using babel cli with the latest upgrade.I had delete keyword in my file so it gave syntax error at that line since by default the files is parsed as es6 modules.Later I got to know from @loganfsmyth that I had to add the --source-type script to let the files be treated as scripts.
By mistake I also run a different version --source-type:"script" which though is syntactically incorrect didn't gave any errors related to bad arguments, rather it simply gives a BABEL_PARSE_ERROR at that delete keyword line.So the point is it should give a command error rather than giving an error which can mislead someone to think that the issue is again related with babel operating in strict mode.

I am attaching the screenshot.The first command in image gives an error while second one works just fine.

[babel-bot]

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