Infinite recursion regression

[akirschbaum]

The following rules do work fine with Grappa 1.0.4 but cause an infinite recursion with Grappa 2.0.0-beta.4.

    @Cached
    public Rule rule2(Var<Integer> count) {
        return firstOf(sequence("c", count.set(0)), sequence("b", rule2(count), count.set(count.getNonnull()+1), "b"));
    }

    @Cached
    public Rule rule3(Var<AtomicInteger> count) {
        return firstOf(sequence("c", set(count, 0)), sequence("b", rule3(count), set(count, count.getNonnull().get()+1), "b"));
    }

    public boolean set(Var<AtomicInteger> var, final int value) {
        var.getNonnull().set(value);
        return true;
    }

In neither case an infinite recursion should occur because both methods are annotated with @cached and because in each recursion the same Var instance is provided.

The stack overflow exception is:

Exception in thread "main" java.lang.StackOverflowError
    at java.util.Arrays.deepHashCode(Arrays.java:4199)
    at org.parboiled.transform.CacheArguments.hashCode(CacheArguments.java:43)
    at java.util.HashMap.hash(HashMap.java:338)
    at java.util.HashMap.get(HashMap.java:556)
    at grappa1.app.Parser$$parboiled.string(Unknown Source)
    at grappa1.app.Parser$$parboiled.fromCharArray(Unknown Source)
    at grappa1.app.Parser$$parboiled.fromStringLiteral(Unknown Source)
    at grappa1.app.Parser$$parboiled.toRule(Unknown Source)
    at org.parboiled.BaseParser.toRules(BaseParser.java:1845)
    at grappa1.app.Parser$$parboiled.sequence(Unknown Source)
    at grappa1.app.Parser$$parboiled.sequence(Unknown Source)
    at grappa1.app.Parser$$parboiled.rule2(Unknown Source)
    at grappa1.app.Parser$$parboiled.rule2(Unknown Source)
    at grappa1.app.Parser$$parboiled.rule2(Unknown Source)
    at grappa1.app.Parser$$parboiled.rule2(Unknown Source)
[...over and over again...]

[fge]

Can you provide a sample input and which rule you run?

[akirschbaum]

Sample input: "bbbcbbb". Rule: either rule2() or rule3() as both cause the regression.

[fge]

OK, there's something going on here; I can't reproduce, at least not with the input which you have given.

Can you provide some code which reproduces the problem for you?

[akirschbaum]

One of the two issues did occur because I was mixing classes from both org.parboiled and com.github.fge.grappa. Using only classes from com.github.fge.grappa did fix one of the problems. The other one still persists.

The following two files (build.gradle and src/main/java/app/Main.java) do reproduce the problem. (Note: the broken lines within the stack trace are not a copy/paste error but did actually occur.)

/tmp/java-grappa1$ cat build.gradle 
defaultTasks 'run'

apply plugin: 'application'
apply plugin: 'java'

sourceCompatibility = 1.7
mainClassName = 'app.Main'

dependencies {
    compile 'com.github.fge:grappa:2.0.0-beta.4'
}

repositories {
    mavenCentral()
}
/tmp/java-grappa1$ cat src/main/java/app/Main.java 
package app;

import com.github.fge.grappa.Grappa;
import com.github.fge.grappa.annotations.Cached;
import com.github.fge.grappa.buffers.CharSequenceInputBuffer;
import com.github.fge.grappa.buffers.InputBuffer;
import com.github.fge.grappa.parsers.BaseParser;
import com.github.fge.grappa.rules.Rule;
import com.github.fge.grappa.run.ListeningParseRunner;
import com.github.fge.grappa.run.ParseRunner;
import com.github.fge.grappa.run.ParsingResult;
import com.github.fge.grappa.support.Var;

public class Main {

    public static void main(final String[] args) {
        final Var<Integer> count = new Var<>(0);
        final Rule start = Grappa.createParser(Parser.class).rule(count);
        final InputBuffer buffer = new CharSequenceInputBuffer("bbbcbbb");
        final ParseRunner<Object> runner = new ListeningParseRunner<>(start);
        final ParsingResult<Object> result = runner.run(buffer);
        if (!result.isSuccess()) {
            System.out.println("parse error");
            System.exit(1);
            throw new AssertionError();
        }
        System.out.println("ok "+count.getNonnull());
    }

    public static class Parser extends BaseParser<Object> {

        @Cached
        public Rule rule(final Var<Integer> count) {
            final Var<Integer> tmp = new Var<>();
            return firstOf(sequence("c", count.set(0)), sequence("b", rule(tmp), count.set(tmp.getNonnull()+1), "b"));
        }

    }
}
/tmp/java-grappa1$ gradle run
:compileJava
:processResources UP-TO-DATE
:classes
:run
Exception in thread "main" java.lang.StackOverflowError
        at java.lang.reflect.Array.newArray(Native Method)
        at java.lang.reflect.Array.newInstance(Array.java:70)
        at com.google.common.collect.Platform.newArray(Platform.java:53)
        at com.google.common.collect.ObjectArrays.newArray(ObjectArrays.java:61)
        at com.google.common.collect.ObjectArrays.arraysCopyOf(ObjectArrays.java:112)
        at com.google.common.collect.ImmutableList.asImmutableList(ImmutableList.java:329)
        at com.google.common.collect.ImmutableList$Builder.build(ImmutableList.java:700)
        at app.Main$Parser$$grappa.sequence(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rulen Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$gule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        aain$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rulwn Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Mair$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
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        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
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        at app.Main$Parser$$grappa.rule(Unknown Source)
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        at app.Main$Parser$$grappa.rule(Unknown Source)
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        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknoce)Sour
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.known Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parsepa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.rser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
     pp.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
        at app.Main$Parser$$grappa.rule(Unknown Source)
:run FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':run'.
> Process 'command '/usr/local/java/64/jdk1.7.0_75/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 7.357 secs

[fge]

The grammar you provide here is quite different from the first one! Also, I don't think it even works with 1.0.x; I'd be highly surprised if it did at all.

[akirschbaum]

You're right: it never did work. It is actually an example for #27.

This issue can be closed because the problem it describes does not occur anymore. It must have been the result of mixing classes from both com.github.fge.grappa and org.parboiled. Using only classes from com.github.fge.grappa makes it work as expected.

[fge]

On to #27 then ;)