Christopher Smith created GROOVY-11024:
------------------------------------------
Summary: STC NPE when using Collectors.toMap() with a generic
result
Key: GROOVY-11024
URL: https://issues.apache.org/jira/browse/GROOVY-11024
Project: Groovy
Issue Type: Bug
Components: Static compilation
Affects Versions: 4.0.11
Reporter: Christopher Smith
I'm not sure what the most specific culprit is, but this reproduces the problem
reliably. (The original use case was using {{DynamoDbTable#index(String)}},
which also returns a generic result.)
{code:groovy}
import static java.util.function.Function.identity
import static java.util.stream.Collectors.toMap
import groovy.transform.CompileStatic
@CompileStatic
class Bug {
Bug() {
['a'].stream().collect(toMap(identity(), List::of))
}
}
{code}
{code}
[ERROR] Caused by: java.lang.NullPointerException: Cannot load from object
array because the return value of
"org.codehaus.groovy.ast.ClassNode.getGenericsTypes()" is null
[ERROR] at
org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isAssignableTo(StaticTypeCheckingSupport.java:496)
[ERROR] at
org.codehaus.groovy.ast.tools.ParameterUtils.parametersMatch(ParameterUtils.java:74)
[ERROR] at
org.codehaus.groovy.ast.tools.ParameterUtils.parametersCompatible(ParameterUtils.java:53)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticTypesMethodReferenceExpressionWriter.lambda$findMethodRefMethod$2(StaticTypesMethodReferenceExpressionWriter.java:334)
[ERROR] at java.base/java.util.Collection.removeIf(Collection.java:576)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticTypesMethodReferenceExpressionWriter.findMethodRefMethod(StaticTypesMethodReferenceExpressionWriter.java:319)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticTypesMethodReferenceExpressionWriter.writeMethodReferenceExpression(StaticTypesMethodReferenceExpressionWriter.java:104)
[ERROR] at
org.codehaus.groovy.classgen.AsmClassGenerator.visitMethodReferenceExpression(AsmClassGenerator.java:925)
[ERROR] at
org.codehaus.groovy.ast.expr.MethodReferenceExpression.visit(MethodReferenceExpression.java:34)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.visitArgument(StaticInvocationWriter.java:513)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.loadArguments(StaticInvocationWriter.java:460)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.writeDirectMethodCall(InvocationWriter.java:213)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.writeDirectMethodCall(StaticInvocationWriter.java:386)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.makeDirectCall(InvocationWriter.java:311)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.makeCall(InvocationWriter.java:131)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.makeCall(InvocationWriter.java:125)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.makeCall(StaticInvocationWriter.java:648)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.writeInvokeMethod(InvocationWriter.java:454)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.writeInvokeMethod(StaticInvocationWriter.java:136)
[ERROR] at
org.codehaus.groovy.classgen.AsmClassGenerator.visitMethodCallExpression(AsmClassGenerator.java:988)
[ERROR] at
org.codehaus.groovy.ast.expr.MethodCallExpression.visit(MethodCallExpression.java:77)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.visitArgument(StaticInvocationWriter.java:513)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.loadArguments(StaticInvocationWriter.java:460)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.writeDirectMethodCall(InvocationWriter.java:213)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.writeDirectMethodCall(StaticInvocationWriter.java:386)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.makeDirectCall(InvocationWriter.java:311)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.makeCall(InvocationWriter.java:131)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.makeCall(InvocationWriter.java:125)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.makeCall(StaticInvocationWriter.java:648)
[ERROR] at
org.codehaus.groovy.classgen.asm.InvocationWriter.writeInvokeMethod(InvocationWriter.java:454)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.writeInvokeMethod(StaticInvocationWriter.java:136)
[ERROR] at
org.codehaus.groovy.classgen.AsmClassGenerator.visitMethodCallExpression(AsmClassGenerator.java:988)
[ERROR] at
org.codehaus.groovy.ast.expr.MethodCallExpression.visit(MethodCallExpression.java:77)
[ERROR] at
org.codehaus.groovy.classgen.asm.StatementWriter.writeExpressionStatement(StatementWriter.java:613)
[ERROR] at
org.codehaus.groovy.classgen.AsmClassGenerator.visitExpressionStatement(AsmClassGenerator.java:827)
[ERROR] at
org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:41)
[ERROR] at
org.codehaus.groovy.classgen.asm.StatementWriter.writeBlockStatement(StatementWriter.java:95)
[ERROR] at
org.codehaus.groovy.classgen.asm.sc.StaticTypesStatementWriter.writeBlockStatement(StaticTypesStatementWriter.java:77)
[ERROR] at
org.codehaus.groovy.classgen.AsmClassGenerator.visitBlockStatement(AsmClassGenerator.java:752)
[ERROR] at
org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:72)
[ERROR] at
org.codehaus.groovy.classgen.AsmClassGenerator.visitStdMethod(AsmClassGenerator.java:611)
[ERROR] at
org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructorOrMethod(AsmClassGenerator.java:546)
[ERROR] at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructor(ClassCodeVisitorSupport.java:105)
[ERROR] at
org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructor(AsmClassGenerator.java:689)
[ERROR] at
org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1121)
[ERROR] at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:52)
[ERROR] at
org.codehaus.groovy.classgen.AsmClassGenerator.visitClass(AsmClassGenerator.java:365)
[ERROR] ... 41 more
{code}
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