Steps to Reproduce

I am getting the following error whenever i execute flutter command in my terminal

Logs

[: !=: unary operator expected

/Users/tham/softwares/flutter/bin/flutter: line 43: [: !=: unary operator expected
Downloading Material fonts...

Oops; flutter has exited unexpectedly.
Sending crash report to Google.
Crash report sent (report ID: f17d2f489794bb56)
Crash report written to /Users/tham/flutter_02.log;
please let us know at https://github.com/flutter/flutter/issues.

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