java - Less4j Compiler NullPointerException on ASTManipulator -
i have styles.less parent files has references less modules. first have less file variables , furthermore making couple of module less files have overview.
the problem have less compile throws nullpointer exception while compiling less files. when use validator or grunt, less files ok.
the following situation fails.
styles.less
@import "core/_settings"; @import "shared-components/_messages"; _settings.less
@breakpoint-two: ~"only screen , (min-width: 767px)"; @breakpoint-three: ~"only screen , (min-width: 960px)"; _messages.less
.message { text-align: center; list-style: none; margin: 0 0 @spacing 0; a{ color: @color-black; &:hover {opacity: .5} } } .message--include { display: block; font-weight: 600; line-height: 1.5rem; margin-bottom: 0.25rem; padding: 0.75rem; vertical-align: baseline; @media @breakpoint-three { padding: 1rem 1.5rem; } p { margin: 0; } } the compiler throws error on media query.
java.lang.nullpointerexception @ com.github.sommeri.less4j.core.compiler.stages.astmanipulator.replace(astmanipulator.java:38) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solveifvariablereference(referencessolver.java:169) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvenonmixinreferences(referencessolver.java:103) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:85) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvenonmixinreferences(referencessolver.java:105) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:85) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvenonmixinreferences(referencessolver.java:105) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:85) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.access$000(referencessolver.java:35) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver$1.run(referencessolver.java:59) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:44) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:24) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:15) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.dosolvereferences(referencessolver.java:55) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvenonmixinreferences(referencessolver.java:101) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:85) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:66) @ com.github.sommeri.less4j.core.compiler.stages.mixinssolver.compilereferencedmixin(mixinssolver.java:72) @ com.github.sommeri.less4j.core.compiler.stages.mixinssolver.access$000(mixinssolver.java:30) @ com.github.sommeri.less4j.core.compiler.stages.mixinssolver$1.run(mixinssolver.java:52) @ com.github.sommeri.less4j.core.compiler.stages.mixinssolver$1.run(mixinssolver.java:47) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinoriginaldatasnapshot(inscopesnapshotrunner.java:104) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinoriginaldatasnapshot(inscopesnapshotrunner.java:79) @ com.github.sommeri.less4j.core.compiler.stages.mixinssolver.resolvemixinreference(mixinssolver.java:47) @ com.github.sommeri.less4j.core.compiler.stages.mixinssolver.access$500(mixinssolver.java:30) @ com.github.sommeri.less4j.core.compiler.stages.mixinssolver$2.run(mixinssolver.java:143) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:44) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:24) @ com.github.sommeri.less4j.core.compiler.stages.mixinssolver.buildmixinreferencereplacement(mixinssolver.java:127) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvemixinreferences(referencessolver.java:130) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:82) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.access$000(referencessolver.java:35) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver$1.run(referencessolver.java:59) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:44) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:24) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:15) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.dosolvereferences(referencessolver.java:55) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvenonmixinreferences(referencessolver.java:101) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:85) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.access$000(referencessolver.java:35) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver$1.run(referencessolver.java:59) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:44) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:24) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:15) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.dosolvereferences(referencessolver.java:55) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvenonmixinreferences(referencessolver.java:101) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:85) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.access$000(referencessolver.java:35) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver$1.run(referencessolver.java:59) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:44) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:24) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:15) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.dosolvereferences(referencessolver.java:55) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvenonmixinreferences(referencessolver.java:101) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:85) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.access$000(referencessolver.java:35) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver$1.run(referencessolver.java:59) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:44) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:24) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:15) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.dosolvereferences(referencessolver.java:55) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvenonmixinreferences(referencessolver.java:101) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.unsafedosolvereferences(referencessolver.java:85) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.access$000(referencessolver.java:35) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver$1.run(referencessolver.java:59) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:44) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:24) @ com.github.sommeri.less4j.core.compiler.scopes.inscopesnapshotrunner.runinlocaldatasnapshot(inscopesnapshotrunner.java:15) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.dosolvereferences(referencessolver.java:55) @ com.github.sommeri.less4j.core.compiler.stages.referencessolver.solvereferences(referencessolver.java:50) @ com.github.sommeri.less4j.core.compiler.lesstocsscompiler.resolvereferences(lesstocsscompiler.java:126) @ com.github.sommeri.less4j.core.compiler.lesstocsscompiler.compiletocss(lesstocsscompiler.java:47) @ com.github.sommeri.less4j.core.threadunsafelesscompiler.docompile(threadunsafelesscompiler.java:84) @ com.github.sommeri.less4j.core.threadunsafelesscompiler.compile(threadunsafelesscompiler.java:71) @ com.github.sommeri.less4j.core.threadunsafelesscompiler.compile(threadunsafelesscompiler.java:63) @ de.agilecoders.wicket.less.lesscachemanager.getcss(lesscachemanager.java:93) @ de.agilecoders.wicket.less.lessresourcestream.getstring(lessresourcestream.java:70) @ org.apache.wicket.util.resource.abstractstringresourcestream.getinputstream(abstractstringresourcestream.java:172) @ org.apache.wicket.request.resource.packageresource.newresourceresponse(packageresource.java:303) @ org.apache.wicket.request.resource.abstractresource.respond(abstractresource.java:498) @ org.apache.wicket.request.handler.resource.resourcerequesthandler.respond(resourcerequesthandler.java:75) @ org.apache.wicket.request.handler.resource.resourcereferencerequesthandler.respond(resourcereferencerequesthandler.java:108) @ org.apache.wicket.request.cycle.requestcycle$handlerexecutor.respond(requestcycle.java:861) @ org.apache.wicket.request.requesthandlerstack.execute(requesthandlerstack.java:64) @ org.apache.wicket.request.cycle.requestcycle.execute(requestcycle.java:261) @ org.apache.wicket.request.cycle.requestcycle.processrequest(requestcycle.java:218) @ org.apache.wicket.request.cycle.requestcycle.processrequestanddetach(requestcycle.java:289) @ org.apache.wicket.protocol.http.wicketfilter.processrequestcycle(wicketfilter.java:259) @ org.apache.wicket.protocol.http.wicketfilter.processrequest(wicketfilter.java:201) @ org.apache.wicket.protocol.http.wicketfilter.dofilter(wicketfilter.java:282) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:241) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:208) @ org.apache.tomcat.websocket.server.wsfilter.dofilter(wsfilter.java:52) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:241) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:208) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:330) @ org.springframework.security.web.access.exceptiontranslationfilter.dofilter(exceptiontranslationfilter.java:113) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) @ org.springframework.security.web.session.sessionmanagementfilter.dofilter(sessionmanagementfilter.java:103) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) @ org.springframework.security.web.authentication.anonymousauthenticationfilter.dofilter(anonymousauthenticationfilter.java:113) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) @ org.springframework.security.web.servletapi.securitycontextholderawarerequestfilter.dofilter(securitycontextholderawarerequestfilter.java:154) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) @ org.springframework.security.web.savedrequest.requestcacheawarefilter.dofilter(requestcacheawarefilter.java:45) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) @ org.springframework.security.web.authentication.logout.logoutfilter.dofilter(logoutfilter.java:110) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) @ org.springframework.security.web.header.headerwriterfilter.dofilterinternal(headerwriterfilter.java:57) @ org.springframework.web.filter.onceperrequestfilter.dofilter(onceperrequestfilter.java:108) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) @ org.springframework.security.web.context.securitycontextpersistencefilter.dofilter(securitycontextpersistencefilter.java:87) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) @ org.springframework.security.web.context.request.async.webasyncmanagerintegrationfilter.dofilterinternal(webasyncmanagerintegrationfilter.java:50) @ org.springframework.web.filter.onceperrequestfilter.dofilter(onceperrequestfilter.java:108) @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) @ org.springframework.security.web.filterchainproxy.dofilterinternal(filterchainproxy.java:192) @ org.springframework.security.web.filterchainproxy.dofilter(filterchainproxy.java:160) @ org.springframework.web.filter.delegatingfilterproxy.invokedelegate(delegatingfilterproxy.java:344) @ org.springframework.web.filter.delegatingfilterproxy.dofilter(delegatingfilterproxy.java:261) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:241) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:208) @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:220) @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:122) @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:501) @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:170) @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:98) @ org.apache.catalina.valves.accesslogvalve.invoke(accesslogvalve.java:950) @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:116) @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:408) @ org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:1040) @ org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:607) @ org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:315) @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1110) @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:603) @ java.lang.thread.run(thread.java:722) i tried commandline version of less4j, have same result. can point out why happening?
thanks in advance.
the author of less4j acknowledged issue , resolved in 1.4.1. see https://github.com/sommeri/less4j/issues/196 more details.
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