Eclipse: epp.package.java 4.5.2.20160218-0600
Spoofax: org.metaborg.spoofax.eclipse 2.0.0.beta1
System: Linux amd64 3.19.0-58-generic

When building a language via the command line (mvn clean verify), I get the following error:

[INFO] Loading dialects
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.698 s
[INFO] Finished at: 2016-04-18T17:08:51-07:00
[INFO] Final Memory: 20M/292M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.metaborg:spoofax-maven-plugin:2.0.0-beta1:clean (default-clean) on project Abc: Execution default-clean of goal org.metaborg:spoofax-maven-plugin:2.0.0-beta1:clean failed: A required class was missing while executing org.metaborg:spoofax-maven-plugin:2.0.0-beta1:clean: org/slf4j/helpers/MessageFormatter
[ERROR] -----------------------------------------------------
[ERROR] realm =    extension>org.metaborg:spoofax-maven-plugin:2.0.0-beta1
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/home/oskar/.m2/repository/org/metaborg/spoofax-maven-plugin/2.0.0-beta1/spoofax-maven-plugin-2.0.0-beta1.jar
[ERROR] urls[1] = file:/home/oskar/.m2/repository/org/apache/maven/maven-builder-support/3.3.9/maven-builder-support-3.3.9.jar
[ERROR] urls[2] = file:/home/oskar/.m2/repository/org/eclipse/aether/aether-util/1.0.2.v20150114/aether-util-1.0.2.v20150114.jar
[ERROR] urls[3] = file:/home/oskar/.m2/repository/javax/enterprise/cdi-api/1.0/cdi-api-1.0.jar
[ERROR] urls[4] = file:/home/oskar/.m2/repository/javax/annotation/jsr250-api/1.0/jsr250-api-1.0.jar
[ERROR] urls[5] = file:/home/oskar/.m2/repository/org/eclipse/sisu/org.eclipse.sisu.inject/0.3.2/org.eclipse.sisu.inject-0.3.2.jar
[ERROR] urls[6] = file:/home/oskar/.m2/repository/com/google/inject/guice/4.0/guice-4.0-no_aop.jar
[ERROR] urls[7] = file:/home/oskar/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.21/plexus-interpolation-1.21.jar
[ERROR] urls[8] = file:/home/oskar/.m2/repository/org/codehaus/plexus/plexus-utils/3.0.22/plexus-utils-3.0.22.jar
[ERROR] urls[9] = file:/home/oskar/.m2/repository/org/codehaus/plexus/plexus-component-annotations/1.6/plexus-component-annotations-1.6.jar
[ERROR] urls[10] = file:/home/oskar/.m2/repository/org/sonatype/plexus/plexus-sec-dispatcher/1.3/plexus-sec-dispatcher-1.3.jar
[ERROR] urls[11] = file:/home/oskar/.m2/repository/org/sonatype/plexus/plexus-cipher/1.4/plexus-cipher-1.4.jar
[ERROR] urls[12] = file:/home/oskar/.m2/repository/org/apache/maven/maven-archiver/3.0.0/maven-archiver-3.0.0.jar
[ERROR] urls[13] = file:/home/oskar/.m2/repository/org/codehaus/plexus/plexus-archiver/2.9.1/plexus-archiver-2.9.1.jar
[ERROR] urls[14] = file:/home/oskar/.m2/repository/org/codehaus/plexus/plexus-io/2.4.1/plexus-io-2.4.1.jar
[ERROR] urls[15] = file:/home/oskar/.m2/repository/org/apache/commons/commons-compress/1.9/commons-compress-1.9.jar
[ERROR] urls[16] = file:/home/oskar/.m2/repository/org/apache/maven/shared/maven-shared-utils/3.0.0/maven-shared-utils-3.0.0.jar
[ERROR] urls[17] = file:/home/oskar/.m2/repository/commons-io/commons-io/2.4/commons-io-2.4.jar
[ERROR] urls[18] = file:/home/oskar/.m2/repository/com/google/code/findbugs/jsr305/3.0.1/jsr305-3.0.1.jar
[ERROR] urls[19] = file:/home/oskar/.m2/repository/org/apache/maven/shared/maven-dependency-tree/2.2/maven-dependency-tree-2.2.jar
[ERROR] urls[20] = file:/home/oskar/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.10/jcl-over-slf4j-1.7.10.jar
[ERROR] urls[21] = file:/home/oskar/.m2/repository/com/jcabi/jcabi-maven-slf4j/0.9/jcabi-maven-slf4j-0.9.jar
[ERROR] urls[22] = file:/home/oskar/.m2/repository/org/metaborg/org.metaborg.core/2.0.0-beta1/org.metaborg.core-2.0.0-beta1.jar
[ERROR] urls[23] = file:/home/oskar/.m2/repository/org/apache/commons/commons-vfs2/2.0/commons-vfs2-2.0.jar
[ERROR] urls[24] = file:/home/oskar/.m2/repository/commons-logging/commons-logging/1.1.1/commons-logging-1.1.1.jar
[ERROR] urls[25] = file:/home/oskar/.m2/repository/org/apache/commons/commons-configuration2/2.0-beta2/commons-configuration2-2.0-beta2.jar
[ERROR] urls[26] = file:/home/oskar/.m2/repository/com/virtlink/commons/commons-configuration2-jackson/0.4.0/commons-configuration2-jackson-0.4.0.jar
[ERROR] urls[27] = file:/home/oskar/.m2/repository/commons-beanutils/commons-beanutils/1.9.2/commons-beanutils-1.9.2.jar
[ERROR] urls[28] = file:/home/oskar/.m2/repository/commons-collections/commons-collections/3.2.1/commons-collections-3.2.1.jar
[ERROR] urls[29] = file:/home/oskar/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.6.0/jackson-core-2.6.0.jar
[ERROR] urls[30] = file:/home/oskar/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.6.0/jackson-databind-2.6.0.jar
[ERROR] urls[31] = file:/home/oskar/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.6.0/jackson-annotations-2.6.0.jar
[ERROR] urls[32] = file:/home/oskar/.m2/repository/com/fasterxml/jackson/dataformat/jackson-dataformat-yaml/2.6.0/jackson-dataformat-yaml-2.6.0.jar
[ERROR] urls[33] = file:/home/oskar/.m2/repository/org/yaml/snakeyaml/1.15/snakeyaml-1.15.jar
[ERROR] urls[34] = file:/home/oskar/.m2/repository/com/google/guava/guava/17.0/guava-17.0.jar
[ERROR] urls[35] = file:/home/oskar/.m2/repository/com/netflix/rxjava/rxjava-core/0.19.6/rxjava-core-0.19.6.jar
[ERROR] urls[36] = file:/home/oskar/.m2/repository/org/javabits/jgrapht/jgrapht-core/0.9.3/jgrapht-core-0.9.3.jar
[ERROR] urls[37] = file:/home/oskar/.m2/repository/com/carrotsearch/hppc/0.7.1/hppc-0.7.1.jar
[ERROR] urls[38] = file:/home/oskar/.m2/repository/org/metaborg/org.metaborg.spoofax.core/2.0.0-beta1/org.metaborg.spoofax.core-2.0.0-beta1.jar
[ERROR] urls[39] = file:/home/oskar/.m2/repository/org/metaborg/org.spoofax.terms/2.0.0-beta1/org.spoofax.terms-2.0.0-beta1.jar
[ERROR] urls[40] = file:/home/oskar/.m2/repository/org/metaborg/org.metaborg.scopegraph/2.0.0-beta1/org.metaborg.scopegraph-2.0.0-beta1.jar
[ERROR] urls[41] = file:/home/oskar/.m2/repository/org/metaborg/org.spoofax.interpreter.core/2.0.0-beta1/org.spoofax.interpreter.core-2.0.0-beta1.jar
[ERROR] urls[42] = file:/home/oskar/.m2/repository/org/metaborg/org.spoofax.jsglr/2.0.0-beta1/org.spoofax.jsglr-2.0.0-beta1.jar
[ERROR] urls[43] = file:/home/oskar/.m2/repository/org/metaborg/org.strategoxt.strj/2.0.0-beta1/org.strategoxt.strj-2.0.0-beta1.jar
[ERROR] urls[44] = file:/home/oskar/.m2/repository/org/metaborg/org.spoofax.interpreter.library.xml/2.0.0-beta1/org.spoofax.interpreter.library.xml-2.0.0-beta1.jar
[ERROR] urls[45] = file:/home/oskar/.m2/repository/org/metaborg/org.spoofax.interpreter.library.java/2.0.0-beta1/org.spoofax.interpreter.library.java-2.0.0-beta1.jar
[ERROR] urls[46] = file:/home/oskar/.m2/repository/org/metaborg/org.spoofax.interpreter.library.jsglr/2.0.0-beta1/org.spoofax.interpreter.library.jsglr-2.0.0-beta1.jar
[ERROR] urls[47] = file:/home/oskar/.m2/repository/org/metaborg/org.spoofax.interpreter.library.index/2.0.0-beta1/org.spoofax.interpreter.library.index-2.0.0-beta1.jar
[ERROR] urls[48] = file:/home/oskar/.m2/repository/org/metaborg/org.metaborg.runtime.task/2.0.0-beta1/org.metaborg.runtime.task-2.0.0-beta1.jar
[ERROR] urls[49] = file:/home/oskar/.m2/repository/org/functionaljava/functionaljava/4.1/functionaljava-4.1.jar
[ERROR] urls[50] = file:/home/oskar/.m2/repository/org/metaborg/org.metaborg.meta.interpreter.framework/2.0.0-beta1/org.metaborg.meta.interpreter.framework-2.0.0-beta1.jar
[ERROR] urls[51] = file:/home/oskar/.m2/repository/com/github/krukow/clj-ds/0.0.4/clj-ds-0.0.4.jar
[ERROR] urls[52] = file:/home/oskar/.m2/repository/org/metaborg/org.metaborg.spoofax.meta.core/2.0.0-beta1/org.metaborg.spoofax.meta.core-2.0.0-beta1.jar
[ERROR] urls[53] = file:/home/oskar/.m2/repository/org/metaborg/org.metaborg.meta.core/2.0.0-beta1/org.metaborg.meta.core-2.0.0-beta1.jar
[ERROR] urls[54] = file:/home/oskar/.m2/repository/org/metaborg/org.metaborg.spoofax.nativebundle/2.0.0-beta1/org.metaborg.spoofax.nativebundle-2.0.0-beta1.jar
[ERROR] urls[55] = file:/home/oskar/.m2/repository/org/metaborg/strategoxt-min-jar/2.0.0-beta1/strategoxt-min-jar-2.0.0-beta1.jar
[ERROR] urls[56] = file:/home/oskar/.m2/repository/org/metaborg/make-permissive/2.0.0-beta1/make-permissive-2.0.0-beta1.jar
[ERROR] urls[57] = file:/home/oskar/.m2/repository/build/pluto/pluto/1.9.0/pluto-1.9.0.jar
[ERROR] urls[58] = file:/home/oskar/.m2/repository/org/sugarj/common/1.7.0/common-1.7.0.jar
[ERROR] urls[59] = file:/home/oskar/.m2/repository/com/cedarsoftware/java-util-pluto-fixes/1.19.4/java-util-pluto-fixes-1.19.4.jar
[ERROR] urls[60] = file:/home/oskar/.m2/repository/org/objenesis/objenesis/2.2/objenesis-2.2.jar
[ERROR] urls[61] = file:/home/oskar/.m2/repository/build/pluto/build-java/1.5.0/build-java-1.5.0.jar
[ERROR] urls[62] = file:/home/oskar/.m2/repository/org/eclipse/tycho/org.eclipse.jdt.core/3.10.0.v20140604-1726/org.eclipse.jdt.core-3.10.0.v20140604-1726.jar
[ERROR] urls[63] = file:/home/oskar/.m2/repository/com/github/spullara/mustache/java/compiler/0.8.17/compiler-0.8.17.jar
[ERROR] urls[64] = file:/home/oskar/.m2/repository/org/apache/ant/ant/1.9.6/ant-1.9.6.jar
[ERROR] urls[65] = file:/home/oskar/.m2/repository/org/apache/ant/ant-launcher/1.9.6/ant-launcher-1.9.6.jar
[ERROR] urls[66] = file:/home/oskar/.m2/repository/ant-contrib/ant-contrib/1.0b3/ant-contrib-1.0b3.jar
[ERROR] urls[67] = file:/home/oskar/.m2/repository/org/metaborg/org.metaborg.util/2.0.0-beta1/org.metaborg.util-2.0.0-beta1.jar
[ERROR] urls[68] = file:/home/oskar/.m2/repository/com/google/inject/guice/3.0/guice-3.0.jar
[ERROR] urls[69] = file:/home/oskar/.m2/repository/aopalliance/aopalliance/1.0/aopalliance-1.0.jar
[ERROR] urls[70] = file:/home/oskar/.m2/repository/com/google/inject/extensions/guice-multibindings/3.0/guice-multibindings-3.0.jar
[ERROR] urls[71] = file:/home/oskar/.m2/repository/org/apache/commons/commons-lang3/3.3.2/commons-lang3-3.3.2.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]
[ERROR] 
[ERROR] -----------------------------------------------------: org.slf4j.helpers.MessageFormatter
[ERROR] -> [Help 1]

Submitted by Oskar van Rest on 19 April 2016 at 02:18

Duplicate of https://yellowgrass.org/issue/SpoofaxWithCore/29, use Maven 3.3.9.