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  1. Groovy
  2. GROOVY-10602

Compiler crash in class generation when combining lambdas and default args

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Details

    • Bug
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • Static Type Checker
    • None

    Description

      This is a quite rare test case

      I have the following program

      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
        }
        
      }
      

      Actual behaviour

      The above test program leads to a compiler crash with the following stack trace

      >>> 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)
      
      

      Expected behaviour

      Compile successfully

      Tested against master (commit: 5c468cd352f37fb5c599a3f51534ffcc55b339ed)

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          People

            emilles Eric Milles
            theosot Thodoris Sotiropoulos
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            Dates

              Created:
              Updated: