Why parser ignores single quotes?

[eugenelepekhin]

Hi,
I have the following lexer file FusionLexer.g4:

lexer grammar FusionLexer;
NumberLiteral: DecNumber;
fragment DecNumber: NonzeroDigit DecDigit*;
fragment DecDigit: [0-9];
fragment NonzeroDigit: [1-9];
Whitespace: [ \t\r\n]+ -> skip;

And the parser file FusionParser.g4:

parser grammar FusionParser;
fusionProgram: number* EOF;
number: NumberLiteral;

When I parse the following text:

'8 '9
'10

I am getting a valid parse tree:
(fusionProgram (number 8) (number 9) (number 10) <EOF>)
Which is puzzling me as I'd expect a syntax error as quotes are not allowed anywhere in the grammar.
Can someone shed some light on what is going on here?
Thanks,
Eugene

[kaby76]

The parser syntax error count (here) isn't incremented for lexer errors. The lexer is a different recognizer than the parser, but doesn't seem to keep a similar error counter, which is rather confusing. The way I deal with this is to replace the error listeners for both the parser and lexer with my own error listeners, which have completely independent error counters that I can use.

[eugenelepekhin]

Awesome, thank you.