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Posted to notifications@groovy.apache.org by "M. Justin (JIRA)" <ji...@apache.org> on 2017/05/31 21:09:04 UTC
[jira] [Created] (GROOVY-8211) ArrayIndexOutOfBoundsException at
compilation when accessing a generic type with the wrong number of type
parameters
M. Justin created GROOVY-8211:
---------------------------------
Summary: ArrayIndexOutOfBoundsException at compilation when accessing a generic type with the wrong number of type parameters
Key: GROOVY-8211
URL: https://issues.apache.org/jira/browse/GROOVY-8211
Project: Groovy
Issue Type: Bug
Components: Static compilation
Reporter: M. Justin
Priority: Minor
When using @CompileStatic, accessing a method on a type that is specified using too few type parameters causes an ArrayIndexOutOfBoundsException to be thrown by the Groovy compiler. Furthermore, there is no indication where in the code the error occurs, so it can be very difficult to debug the issue.
{code}@CompileStatic
class GenericsCompilation {
def method() {
Map<String> map
map.toString() //This line causes the issue
}
}{code}
The output is:
{code}$ groovyc GenericsCompilation.groovy
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
General error during instruction selection: 1
java.lang.ArrayIndexOutOfBoundsException: 1
at org.codehaus.groovy.ast.tools.GenericsUtils.extractPlaceholders(GenericsUtils.java:164)
at org.codehaus.groovy.ast.tools.GenericsUtils.extractPlaceholders(GenericsUtils.java:136)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.typeCheckMethodsWithGenerics(StaticTypeCheckingSupport.java:1338)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.typeCheckMethodsWithGenerics(StaticTypeCheckingSupport.java:1319)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.typeCheckMethodsWithGenericsOrFail(StaticTypeCheckingVisitor.java:4529)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitMethodCallExpression(StaticTypeCheckingVisitor.java:2966)
at org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitMethodCallExpression(StaticCompilationVisitor.java:317)
at org.codehaus.groovy.ast.expr.MethodCallExpression.visit(MethodCallExpression.java:66)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitExpressionStatement(CodeVisitorSupport.java:71)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitExpressionStatement(ClassCodeVisitorSupport.java:196)
at org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:42)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitBlockStatement(CodeVisitorSupport.java:37)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitBlockStatement(ClassCodeVisitorSupport.java:166)
at org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:71)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:104)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:115)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitConstructorOrMethod(StaticTypeCheckingVisitor.java:1784)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:126)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.startMethodInference(StaticTypeCheckingVisitor.java:2119)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitMethod(StaticTypeCheckingVisitor.java:2078)
at org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitMethod(StaticCompilationVisitor.java:164)
at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1078)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:53)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitClass(StaticTypeCheckingVisitor.java:249)
at org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitClass(StaticCompilationVisitor.java:123)
at org.codehaus.groovy.transform.sc.StaticCompileTransformation.visit(StaticCompileTransformation.java:63)
at org.codehaus.groovy.transform.ASTTransformationVisitor.visitClass(ASTTransformationVisitor.java:134)
at org.codehaus.groovy.transform.ASTTransformationVisitor$2.call(ASTTransformationVisitor.java:178)
at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1053)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:591)
at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:569)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:546)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:525)
at org.codehaus.groovy.tools.FileSystemCompiler.compile(FileSystemCompiler.java:61)
at org.codehaus.groovy.tools.FileSystemCompiler.doCompilation(FileSystemCompiler.java:217)
at org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompile(FileSystemCompiler.java:150)
at org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompileWithErrorHandling(FileSystemCompiler.java:180)
at org.codehaus.groovy.tools.FileSystemCompiler.main(FileSystemCompiler.java:164)
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.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:109)
at org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:131)
{code}
I discovered this issue when doing a refactoring that changed the number of type parameters on a type, but missed updating a spot in the code to use the correct number of parameters. It was completely unclear to me where or what the issue was, other than the fact that it likely had something to do with generics.
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