sass-maven-plugin fails on Mac: can't convert String into Array

[adamsiemion]

mvn clean install -Pqulice fails with:

[INFO] --- sass-maven-plugin:1.1.1:update-stylesheets (generate-css) @ rultor ---
[INFO] Compiling SASS Templates
[INFO] Queing SASS Template for compile: /private/tmp/rultor/src/main/scss => /private/tmp/rultor/target/css
TypeError: can't convert String into Array
       + at org/jruby/RubyArray.java:2963
  (root) at <script>:5
org.jruby.embed.EvalFailedException: (TypeError) can't convert String into Array
    at org.jruby.embed.internal.EmbedEvalUnitImpl.run(EmbedEvalUnitImpl.java:136)
    at org.jruby.embed.jsr223.JRubyEngine.eval(JRubyEngine.java:90)
    at org.jruby.embed.jsr223.JRubyEngine.eval(JRubyEngine.java:153)
    at org.jasig.maven.plugin.sass.AbstractSassMojo.executeSassScript(AbstractSassMojo.java:191)
    at org.jasig.maven.plugin.sass.UpdateStylesheetsMojo.execute(UpdateStylesheetsMojo.java:43)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:582)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.jruby.exceptions.RaiseException: (TypeError) can't convert String into Array
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.836 s
[INFO] Finished at: 2015-01-31T09:59:54+01:00
[INFO] Final Memory: 26M/367M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.jasig.maven:sass-maven-plugin:1.1.1:update-stylesheets (generate-css) on project rultor: Failed to execute SASS ruby script:
[ERROR] require 'rubygems'
[ERROR] env = { 'GEM_PATH' => [
[ERROR] '/private/tmp/rultor/target/rubygems'
[ERROR] ] }
[ERROR] env['GEM_PATH'] += ENV['GEM_PATH'] unless ENV['GEM_PATH'].nil?
[ERROR] Gem.paths = env
[ERROR] require 'sass/plugin'
[ERROR] require 'java'
[ERROR] Sass::Plugin.options.merge!(
[ERROR] :cache_location => '/private/tmp/rultor/target/sass_cache',
[ERROR] :style => :expanded,
[ERROR] :cache => true,
[ERROR] :unix_newlines => true,
[ERROR] :css_location => '/private/tmp/rultor/target/css',
[ERROR] :template_location => '/private/tmp/rultor/src/main/scss',
[ERROR] :always_update => true
[ERROR] )
[ERROR] Sass::Plugin.on_compilation_error {|error, template, css| $compiler_callback.compilationError(error.message, template, css) }
[ERROR] Sass::Plugin.on_updated_stylesheet {|template, css| $compiler_callback.updatedStylesheeet(template, css) }
[ERROR] Sass::Plugin.on_template_modified {|template| $compiler_callback.templateModified(template) }
[ERROR] Sass::Plugin.on_template_created {|template| $compiler_callback.templateCreated(template) }
[ERROR] Sass::Plugin.on_template_deleted {|template| $compiler_callback.templateDeleted(template) }
[ERROR] Sass::Plugin.update_stylesheets: org.jruby.exceptions.RaiseException: (TypeError) can't convert String into Array

my setup: OS X 10.10 javac 1.8.0_25 ruby 2.1.4p265 (2014-10-27 revision 48166) [x86_64-darwin14.0] ruby gems version 2.4.4

[yegor256]

@it's a known issue, in the plugin, see https://github.com/Jasig/sass-maven-plugin/issues/47 before running Maven do:

unset GEM_PATH

[bcostea]

thanks for the comment :)