Lexer tokenized input:
======================
[T:Variable reference with invalid name: $(7var)][NL:
][Eof:]
Tokens:
=======
[Token Text at TS-err-variableRef2.txt(1:1 [0] - 1:46 [45]): 'Variable reference with invalid name: $(7var)']
[Token NewLine at TS-err-variableRef2.txt(1:46 [45] - 2:1 [46]): '\n']
[Token Eof at TS-err-variableRef2.txt(2:1 [46] - 2:1 [46]): '']

[PARSER ERROR: code InvalidVariableName at 1:39 [38] - 1:42 [41] in TS-err-variableRef2.txt, token text: $(7, message: Incorrect syntax was encountered while parsing '$(7'.]