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[Bug] Impossible regular expression in macro lead to ArrayIndexOut [sf#104] #106

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lsf37 opened this Issue Feb 15, 2015 · 2 comments

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lsf37 commented Feb 15, 2015

*Reported by anonymous on 2009-04-16 17:25 UTC
Hello,
one of the developer on my project has declared a new macro with an impossible regular expression:

ALPHA_NUMERIC = [a-Z0-9]

This one does not create any warning during Java code generation but:

Warning : Macro "ALPHA_NUMERIC" has been declared but never used.

However at runtime, it throws the following exception:

Caused by: java.lang.ArrayIndexOutOfBoundsException: 65536
at TestCase.zzUnpackCMap
at TestCase.<clinit>
... 6 more

In fact the regular expression [a-Z] is impossible because of ASCII char order, the developer meant [A-z].

Please find attached a testcase TestCase.flex.

The following Main.java class can be used:

import java.io.ByteArrayInputStream;
import java.io.IOException;

public class Main {
public static void main(String[] args) throws IOException {
new TestCase(new ByteArrayInputStream("Hello\nWorld!".getBytes())).readMessage();
}
}

Regards,
Loïc

@lsf37 lsf37 changed the title from Impossible regular expression in macro lead to ArrayIndexOut to [Bug] Impossible regular expression in macro lead to ArrayIndexOut [sf#104] Feb 15, 2015

@lsf37 lsf37 added this to the jflex bug milestone Feb 15, 2015

@lsf37 lsf37 closed this Feb 15, 2015

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lsf37 Feb 15, 2015

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Commented by nobody on 2009-04-16 17:25 UTC
Flex file

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lsf37 commented Feb 15, 2015

Commented by nobody on 2009-04-16 17:25 UTC
Flex file

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Commented by nobody on 2009-04-30 12:12 UTC
Thanks for the report, I've reproduced the problem. It will be fixed for the next release.

Cheers,
Gerwin

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lsf37 commented Feb 15, 2015

Commented by nobody on 2009-04-30 12:12 UTC
Thanks for the report, I've reproduced the problem. It will be fixed for the next release.

Cheers,
Gerwin

@lsf37 lsf37 added bug and removed bug labels Feb 17, 2015

@lsf37 lsf37 modified the milestone: jflex bug Feb 17, 2015

@regisd regisd added this to the 1.5.0 milestone Nov 4, 2017

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