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java.lang.NullPointerException: 	at com.github.mauricioaniche.springlint.analysis.smells.SmellsRequestor.acceptAST(SmellsRequestor.java:33)	at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:1029)	at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:636)	at org.eclipse.jdt.core.dom.ASTParser.createASTs(ASTParser.java:990)	at com.github.mauricioaniche.springlint.analysis.smells.Parser.execute(Parser.java:59)	at com.github.mauricioaniche.springlint.analysis.smells.SmellAnalysis.searchSmells(SmellAnalysis.java:37)	at com.github.mauricioaniche.springlint.analysis.smells.SmellAnalysis.run(SmellAnalysis.java:29)	at com.github.mauricioaniche.springlint.RunAllAnalysis.run(RunAllAnalysis.java:40)	at com.github.mauricioaniche.springlint.SpringLintMojo.execute(SpringLintMojo.java:38)	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)	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:128)	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)	at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	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)