Passing ["foo of bar"] to each causing a syntax error

[WallTack]

Pug Version:
3.0.0
Node Version:
12.18.0

Input Pug

each string in ["foo of bar"]
    h1= string

Expected HTML

<h1>foo of bar</h1>

Actual HTML

None.

Syntax Error: Unterminated string constant

Full Error

  > 1| each string in ["foo of bar"]
----------------------------------^
    2|     h1= string

Syntax Error: Unterminated string constant
    at makeError (...\app\node_modules\pug-error\index.js:34:13)
    at Lexer.error (...\app\node_modules\pug-lexer\index.js:62:15)
    at Lexer.assertExpression (...\app\node_modules\pug-lexer\index.js:96:12)
    at Lexer.eachOf (...\app\node_modules\pug-lexer\index.js:1090:12)
    at Lexer.callLexerFunction (...\app\node_modules\pug-lexer\index.js:1642:23)
    at Lexer.advance (...\app\node_modules\pug-lexer\index.js:1671:12)
    at Lexer.callLexerFunction (...\app\node_modules\pug-lexer\index.js:1642:23)
    at Lexer.getTokens (...\app\node_modules\pug-lexer\index.js:1701:12)
    at lex (...\app\node_modules\pug-lexer\index.js:12:42)
    at Object.lex (...\app\node_modules\pug\lib\index.js:104:9)

Temporary fix

Assigning the array or object to a variable fixes the problem. For example:

- var testVar = ["foo of bar"]
each string in testVar
    h1= string

Also, don't start your variable name with "of", as mentioned here: #3263

Additional Comments

Seems related to #3263 (the word "of")

The error is caused when the word "of" is in a string that's being passed to an each statement. The string can be in an array as show above, or it can be in an object; both cause the error.

The word "of" must also be after any other character (including whitespace) in the string for the error to occur. For example, passing ["of bar"] instead of ["foo of bar"] will not result in an error.

Passing another string after the "foo of bar" string yields a Syntax Error: Unexpected token rather than a Syntax Error: Unterminated string constant as seen here:

> 1| each string in ["foo of bar", "something else"]
--------------------------------^
  2|     h1=string

Syntax Error: Unexpected token

The rest of the error traceback is identical, so I won't clutter the post by adding it.