[jira] [Assigned] (GROOVY-10602) Compiler crash in class generation when combining lambdas and default args

["Eric Milles (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GROOVY-10602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Milles reassigned GROOVY-10602:
------------------------------------

    Assignee: Eric Milles

> Compiler crash in class generation when combining lambdas and default args
> --------------------------------------------------------------------------
>
>                 Key: GROOVY-10602
>                 URL: https://issues.apache.org/jira/browse/GROOVY-10602
>             Project: Groovy
>          Issue Type: Bug
>          Components: Static Type Checker
>            Reporter: Thodoris Sotiropoulos
>            Assignee: Eric Milles
>            Priority: Major
>
> This is a quite rare test case
> I have the following program
> {code}
> import java.util.function.Supplier;
> class Test {
>   public static void test(Closure<Byte> x = {Byte v -> { Closure<Byte> y = { Supplier<Byte> d = { -> v } -> d.get() }; y() }}) {
>     null
>   }
>   
> }
> {code}
> h3. Actual behaviour
> The above test program leads to a compiler crash with the following stack trace
> {code}
> >>> a serious error occurred: BUG! exception in phase 'class generation' in source unit 'test.groovy' tried to get a variable with the name v as stack variable, but a variable with this name was not created
> >>> stacktrace:
> BUG! exception in phase 'class generation' in source unit 'test.groovy' tried to get a variable with the name v as stack variable, but a variable with this name was not created
>         at org.codehaus.groovy.classgen.asm.CompileStack.getVariable(CompileStack.java:303)
>         at org.codehaus.groovy.classgen.asm.ClosureWriter.loadReference(ClosureWriter.java:151)
>         at org.codehaus.groovy.classgen.asm.ClosureWriter.writeClosure(ClosureWriter.java:126)
>         at org.codehaus.groovy.classgen.AsmClassGenerator.visitClosureExpression(AsmClassGenerator.java:858)
>         at org.codehaus.groovy.ast.expr.ClosureExpression.visit(ClosureExpression.java:110)
>         at org.codehaus.groovy.classgen.asm.BinaryExpressionHelper.evaluateEqual(BinaryExpressionHelper.java:397)
>         at org.codehaus.groovy.classgen.AsmClassGenerator.visitDeclarationExpression(AsmClassGenerator.java:833)
>         at org.codehaus.groovy.ast.expr.DeclarationExpression.visit(DeclarationExpression.java:89)
>         at org.codehaus.groovy.classgen.asm.StatementWriter.writeExpressionStatement(StatementWriter.java:611)
>         at org.codehaus.groovy.classgen.AsmClassGenerator.visitExpressionStatement(AsmClassGenerator.java:817)
>         at org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:41)
>         at org.codehaus.groovy.classgen.asm.StatementWriter.writeBlockStatement(StatementWriter.java:94)
>         at org.codehaus.groovy.classgen.AsmClassGenerator.visitBlockStatement(AsmClassGenerator.java:748)
>         at org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:70)
>         at org.codehaus.groovy.classgen.AsmClassGenerator.visitStdMethod(AsmClassGenerator.java:602)
>         at org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructorOrMethod(AsmClassGenerator.java:547)
>         at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:110)
>         at org.codehaus.groovy.classgen.AsmClassGenerator.visitMethod(AsmClassGenerator.java:686)
>         at org.codehaus.groovy.ast.ClassNode.visitMethods(ClassNode.java:1131)
>         at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1124)
>         at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:52)
>         at org.codehaus.groovy.classgen.AsmClassGenerator.visitClass(AsmClassGenerator.java:365)
>         at org.codehaus.groovy.control.CompilationUnit$3.call(CompilationUnit.java:797)
>         at org.codehaus.groovy.control.CompilationUnit$IPrimaryClassNodeOperation.doPhaseOperation(CompilationUnit.java:937)
>         at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:692)
>         at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:666)
>         at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:647)
>         at org.codehaus.groovy.tools.FileSystemCompiler.compile(FileSystemCompiler.java:311)
>         at org.codehaus.groovy.tools.FileSystemCompiler.doCompilation(FileSystemCompiler.java:240)
>         at org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompile(FileSystemCompiler.java:165)
>         at org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompileWithErrorHandling(FileSystemCompiler.java:205)
>         at org.codehaus.groovy.tools.FileSystemCompiler.main(FileSystemCompiler.java:189)
> {code}
> h3. Expected behaviour
> Compile successfully
> Tested against master (commit: 5c468cd352f37fb5c599a3f51534ffcc55b339ed)



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