Re: GWT Compiler hangs

Infinite loop may be created when optimization level is 9 (default). So pass '-optimize 8' to GWT compiler to reduce optimization level and the risk of infinite loop.

See: https://groups.google.com/forum/#!topic/Google-Web-Toolkit/oith5a0hSZ0

On Thu, Aug 16, 2018 at 2:07 AM Dmitry Skavish <skavish@gmail.com> wrote:

hey everyone,

we are working on large GWT codebase (for 7 years already) and everything has been great until today.

today we introduced some change which results in GWT compiler hanging up. funny thing is that it hangs when we run it with -logLevel INFO

and the stacktrace always originates from .optimizeJsLoop()

main" #1 prio=5 os_prio=31 tid=0x00007fd67200b000 nid=0x2503 runnable [0x0000700008d54000]

   java.lang.Thread.State: RUNNABLE

    at com.google.gwt.dev.js.ast.JsExprStmt.traverse(JsExprStmt.java:41)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsVisitor.doAcceptWithInsertRemove(JsVisitor.java:461)

    at com.google.gwt.dev.js.ast.JsVisitor.acceptWithInsertRemove(JsVisitor.java:121)

    at com.google.gwt.dev.js.ast.JsBlock.traverse(JsBlock.java:53)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsVisitor.doAccept(JsVisitor.java:444)

    at com.google.gwt.dev.js.ast.JsVisitor.accept(JsVisitor.java:109)

    at com.google.gwt.dev.js.JsInliner.containsNestedFunctions(JsInliner.java:1600)

    at com.google.gwt.dev.js.JsInliner.affectedBySideEffects(JsInliner.java:1578)

    at com.google.gwt.dev.js.JsInliner.isVolatile(JsInliner.java:1875)

    at com.google.gwt.dev.js.JsInliner.isInlinable(JsInliner.java:1804)

    at com.google.gwt.dev.js.JsInliner.access$500(JsInliner.java:83)

    at com.google.gwt.dev.js.JsInliner$InliningVisitor.process(JsInliner.java:988)

    at com.google.gwt.dev.js.JsInliner$InliningVisitor.endVisit(JsInliner.java:798)

    at com.google.gwt.dev.js.ast.JsInvocation.traverse(JsInvocation.java:91)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$NodeContext.traverse(JsModVisitor.java:153)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAccept(JsModVisitor.java:176)

    at com.google.gwt.dev.js.ast.JsVisitor.accept(JsVisitor.java:109)

    at com.google.gwt.dev.js.ast.JsExprStmt.traverse(JsExprStmt.java:42)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$ListContext.traverse(JsModVisitor.java:80)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAcceptWithInsertRemove(JsModVisitor.java:197)

    at com.google.gwt.dev.js.ast.JsVisitor.acceptWithInsertRemove(JsVisitor.java:121)

    at com.google.gwt.dev.js.ast.JsBlock.traverse(JsBlock.java:53)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$NodeContext.traverse(JsModVisitor.java:153)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAccept(JsModVisitor.java:176)

    at com.google.gwt.dev.js.ast.JsVisitor.accept(JsVisitor.java:109)

    at com.google.gwt.dev.js.ast.JsFor.traverse(JsFor.java:107)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$ListContext.traverse(JsModVisitor.java:80)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAcceptWithInsertRemove(JsModVisitor.java:197)

    at com.google.gwt.dev.js.ast.JsVisitor.acceptWithInsertRemove(JsVisitor.java:121)

    at com.google.gwt.dev.js.ast.JsBlock.traverse(JsBlock.java:53)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$NodeContext.traverse(JsModVisitor.java:153)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAccept(JsModVisitor.java:176)

    at com.google.gwt.dev.js.ast.JsVisitor.accept(JsVisitor.java:109)

    at com.google.gwt.dev.js.ast.JsFunction.traverse(JsFunction.java:181)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$NodeContext.traverse(JsModVisitor.java:153)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAccept(JsModVisitor.java:176)

    at com.google.gwt.dev.js.ast.JsVisitor.accept(JsVisitor.java:109)

    at com.google.gwt.dev.js.ast.JsExprStmt.traverse(JsExprStmt.java:42)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$ListContext.traverse(JsModVisitor.java:80)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAcceptWithInsertRemove(JsModVisitor.java:197)

    at com.google.gwt.dev.js.ast.JsVisitor.acceptWithInsertRemove(JsVisitor.java:121)

    at com.google.gwt.dev.js.ast.JsBlock.traverse(JsBlock.java:53)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$NodeContext.traverse(JsModVisitor.java:153)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAccept(JsModVisitor.java:176)

    at com.google.gwt.dev.js.ast.JsVisitor.accept(JsVisitor.java:109)

    at com.google.gwt.dev.js.ast.JsProgramFragment.traverse(JsProgramFragment.java:41)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$NodeContext.traverse(JsModVisitor.java:153)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAccept(JsModVisitor.java:176)

    at com.google.gwt.dev.js.ast.JsVisitor.accept(JsVisitor.java:109)

    at com.google.gwt.dev.js.ast.JsProgram.traverse(JsProgram.java:120)

    at com.google.gwt.dev.js.ast.JsVisitor.doTraverse(JsVisitor.java:467)

    at com.google.gwt.dev.js.ast.JsModVisitor$NodeContext.traverse(JsModVisitor.java:153)

    at com.google.gwt.dev.js.ast.JsModVisitor.doAccept(JsModVisitor.java:176)

    at com.google.gwt.dev.js.ast.JsVisitor.accept(JsVisitor.java:109)

    at com.google.gwt.dev.js.JsInliner.execImpl(JsInliner.java:1627)

    at com.google.gwt.dev.js.JsInliner.exec(JsInliner.java:1561)

    at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.optimizeJsLoop(JavaToJavaScriptCompiler.java:1001)

    at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.optimizeJs(JavaToJavaScriptCompiler.java:529)

    at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:412)

    at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:272)

    at com.google.gwt.dev.CompilePerms.compile(CompilePerms.java:198)

    at com.google.gwt.dev.CompilePermsServer.compilePermutation(CompilePermsServer.java:313)

    at com.google.gwt.dev.CompilePermsServer.run(CompilePermsServer.java:276)

    at com.google.gwt.dev.CompilePermsServer.main(CompilePermsServer.java:239)

the top could be different.

now when we run it with -logLevel DEBUG and up the build does not hang, it fails with something like that:

com.google.inject.internal.util.$ComputationException: java.lang.ArrayIndexOutOfBoundsException: 52264

[INFO] at com.google.inject.internal.util.$MapMaker$StrategyImpl.compute(MapMaker.java:553)

[INFO] at com.google.inject.internal.util.$MapMaker$StrategyImpl.compute(MapMaker.java:419)

[INFO] at com.google.inject.internal.util.$CustomConcurrentHashMap$ComputingImpl.get(CustomConcurrentHashMap.java:2041)

[INFO] at com.google.inject.internal.util.$StackTraceElements.forMember(StackTraceElements.java:53)

[INFO] at com.google.inject.internal.ProviderMethod.toString(ProviderMethod.java:118)

[INFO] at java.lang.String.valueOf(String.java:2994)

[INFO] at java.lang.StringBuilder.append(StringBuilder.java:131)

[INFO] at java.util.AbstractMap.toString(AbstractMap.java:559)

[INFO] at com.google.inject.internal.util.$ToStringBuilder.toString(ToStringBuilder.java:46)

[INFO] at com.google.inject.internal.ProviderInstanceBindingImpl.toString(ProviderInstanceBindingImpl.java:97)

[INFO] at java.util.Formatter$FormatSpecifier.printString(Formatter.java:2886)

[INFO] at java.util.Formatter$FormatSpecifier.print(Formatter.java:2763)

[INFO] at java.util.Formatter.format(Formatter.java:2520)

[INFO] at java.util.Formatter.format(Formatter.java:2455)

[INFO] at java.lang.String.format(String.java:2940)

[INFO] at com.google.gwt.inject.rebind.util.PrettyPrinter.format(PrettyPrinter.java:75)

[INFO] at com.google.gwt.inject.rebind.util.PrettyPrinter.log(PrettyPrinter.java:57)

[INFO] at com.google.gwt.inject.rebind.GuiceElementVisitor.visit(GuiceElementVisitor.java:97)

[INFO] at com.google.gwt.inject.rebind.GuiceElementVisitor.visit(GuiceElementVisitor.java:40)

[INFO] at com.google.inject.internal.BindingImpl.acceptVisitor(BindingImpl.java:93)

[INFO] at com.google.gwt.inject.rebind.GuiceElementVisitor.visitElements(GuiceElementVisitor.java:90)

[INFO] at com.google.gwt.inject.rebind.GuiceElementVisitor.visitElementsAndReportErrors(GuiceElementVisitor.java:73)

[INFO] at com.google.gwt.inject.rebind.BindingsProcessor.createBindingsForModules(BindingsProcessor.java:201)

[INFO] at com.google.gwt.inject.rebind.BindingsProcessor.process(BindingsProcessor.java:102)

[INFO] at com.google.gwt.inject.rebind.GinjectorGeneratorImpl.generate(GinjectorGeneratorImpl.java:79)

[INFO] at com.google.gwt.inject.rebind.GinjectorGenerator.generate(GinjectorGenerator.java:74)

[INFO] at com.google.gwt.core.ext.IncrementalGenerator.generateNonIncrementally(IncrementalGenerator.java:40)

[INFO] at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:745)

[INFO] at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:103)

[INFO] at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:78)

[INFO] at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:262)

[INFO] at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:251)

[INFO] at com.google.gwt.dev.PrecompilationContextCreator$1.getAllPossibleRebindAnswers(PrecompilationContextCreator.java:86)

[INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createStaticRebindExpression(UnifyAst.java:519)

[INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createRebindExpression(UnifyAst.java:487)

[INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.maybeHandleMagicMethodCall(UnifyAst.java:415)

[INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.visit(UnifyAst.java:402)

[INFO] at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:265)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)

[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:118)

[INFO] at com.google.gwt.dev.jjs.ast.JCastOperation.traverse(JCastOperation.java:76)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)

[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:118)

[INFO] at com.google.gwt.dev.jjs.ast.JBinaryOperation.traverse(JBinaryOperation.java:89)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)

[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:118)

[INFO] at com.google.gwt.dev.jjs.ast.JExpressionStatement.traverse(JExpressionStatement.java:42)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor$ListContext.traverse(JModVisitor.java:88)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.acceptWithInsertRemove(JModVisitor.java:331)

[INFO] at com.google.gwt.dev.jjs.ast.JBlock.traverse(JBlock.java:94)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:139)

[INFO] at com.google.gwt.dev.jjs.ast.JIfStatement.traverse(JIfStatement.java:53)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor$ListContext.traverse(JModVisitor.java:88)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.acceptWithInsertRemove(JModVisitor.java:331)

[INFO] at com.google.gwt.dev.jjs.ast.JBlock.traverse(JBlock.java:94)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:139)

[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:135)

[INFO] at com.google.gwt.dev.jjs.ast.JMethodBody.traverse(JMethodBody.java:83)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)

[INFO] at com.google.gwt.dev.jjs.ast.JMethod.visitChildren(JMethod.java:786)

[INFO] at com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:778)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)

[INFO] at com.google.gwt.dev.jjs.impl.UnifyAst.mainLoop(UnifyAst.java:1401)

[INFO] at com.google.gwt.dev.jjs.impl.UnifyAst.exec(UnifyAst.java:896)

[INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.unifyJavaAst(JavaToJavaScriptCompiler.java:1410)

[INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.constructJavaAst(JavaToJavaScriptCompiler.java:1222)

[INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.precompile(JavaToJavaScriptCompiler.java:1140)

[INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.precompile(JavaToJavaScriptCompiler.java:255)

[INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:255)

[INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:202)

[INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:143)

[INFO] at com.google.gwt.dev.Compiler.compile(Compiler.java:204)

[INFO] at com.google.gwt.dev.Compiler.compile(Compiler.java:155)

[INFO] at com.google.gwt.dev.Compiler.compile(Compiler.java:144)

[INFO] at com.google.gwt.dev.Compiler$1.run(Compiler.java:118)

[INFO] at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:55)

[INFO] at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:50)

[INFO] at com.google.gwt.dev.Compiler.main(Compiler.java:125)

[INFO] Caused by: java.lang.ArrayIndexOutOfBoundsException: 52264

[INFO] at com.google.inject.internal.asm.$ClassReader.readClass(Unknown Source)

[INFO] at com.google.inject.internal.asm.$ClassReader.accept(Unknown Source)

[INFO] at com.google.inject.internal.asm.$ClassReader.accept(Unknown Source)

[INFO] at com.google.inject.internal.util.$LineNumbers.<init>(LineNumbers.java:62)

[INFO] at com.google.inject.internal.util.$StackTraceElements$1.apply(StackTraceElements.java:36)

[INFO] at com.google.inject.internal.util.$StackTraceElements$1.apply(StackTraceElements.java:33)

[INFO] at com.google.inject.internal.util.$MapMaker$StrategyImpl.compute(MapMaker.java:549)

[INFO] ... 91 more

any idea what is wrong? is it possibly to somehow see what class/file is causing the problem? and why it fails with DEBUG, but hangs with INFO?

thanks!

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