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Some students say they cannot build the project with gradlew. @Harry-Chen suspects the gradle jar is missing (ignored by .gitignore) and maybe it's true. However, I believe *.jar files should be ignored because we hope students NOT submit their built jars to their repositories.

How to fix?

Currently, please install the lastest gradle yourself and use gradle build instead.

This bug is considered in the next release.

I'm on Linux Manjaro and I was trying to build decaf from the src and when I would run: gradle build
it would fail for the jar task stating something about a duplicate META-INF/LICENSE file. The fix for me was this:

The original snippet of the build.gradle file:
`tasks.compileJava.dependsOn tasks.ll1pg

jar {
manifest {
attributes 'Main-Class': 'decaf.Main'
}

// Create a fat JAR with all the dependencies.
from {
    configurations.runtimeClasspath.collect {
        it.isDirectory() ? it : zipTree(it)
    }
}

}`

I changed it to:
`tasks.compileJava.dependsOn tasks.ll1pg

jar {
setDuplicatesStrategy(DuplicatesStrategy.INCLUDE);
manifest {
attributes 'Main-Class': 'decaf.Main'
}

// Create a fat JAR with all the dependencies.
from {
    configurations.runtimeClasspath.collect {
        it.isDirectory() ? it : zipTree(it)
    }
}

}`

and now, despite giving an error about JavaExecHandlerBuilder.setMain(String) method being deprecated, it compiles. I also changed the commons-cli version from 1.5 to 1.5.0 though I'm not sure if that matters.

Input:

class Main {
    static void main() {
        int[][] test;
        int[] a = new int[test[10]];
        int[] b = new int[main()];
        main()[10] = 1;
    }
}

Output:

*** Error at (4,31): new array length must be an integer
*** Error at (5,31): new array length must be an integer
*** Error at (6,13): [] can only be applied to arrays

Should be:

*** Error at (4,27): new array length must be an integer
*** Error at (5,27): new array length must be an integer
*** Error at (6,15): [] can only be applied to arrays