Thodoris Sotiropoulos created GROOVY-10323:
----------------------------------------------
Summary: Compiler crashes on parameterized function with duplicate
type variables
Key: GROOVY-10323
URL: https://issues.apache.org/jira/browse/GROOVY-10323
Project: Groovy
Issue Type: Bug
Components: Static Type Checker
Reporter: Thodoris Sotiropoulos
The following program
{code:java}
class A {
<T, T> T foo(T t) { return t; }
}
class C<T> {}
class B {
void test() {
(new A()).foo(new C<String>());
}
}
{code}
crashes the compiler with the stacktrace below
{code}
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
General error during canonicalization: Duplicate key T (attempted merging
values T and T)
java.lang.IllegalStateException: Duplicate key T (attempted merging values T
and T)
at
java.base/java.util.stream.Collectors.duplicateKeyException(Collectors.java:133)
at
java.base/java.util.stream.Collectors.lambda$uniqKeysMapAccumulator$1(Collectors.java:180)
at
java.base/java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169)
at
java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
at
java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at
java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at
java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
at
java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at
java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.extractGenericsConnectionsFromArguments(StaticTypeCheckingVisitor.java:5387)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.inferReturnTypeGenerics(StaticTypeCheckingVisitor.java:5313)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitMethodCallExpression(StaticTypeCheckingVisitor.java:3538)
at
org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitMethodCallExpression(StaticCompilationVisitor.java:414)
at
org.codehaus.groovy.ast.expr.MethodCallExpression.visit(MethodCallExpression.java:77)
at
org.codehaus.groovy.ast.CodeVisitorSupport.visitExpressionStatement(CodeVisitorSupport.java:117)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitExpressionStatement(ClassCodeVisitorSupport.java:204)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitExpressionStatement(StaticTypeCheckingVisitor.java:2190)
at
org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:41)
at
org.codehaus.groovy.ast.CodeVisitorSupport.visitBlockStatement(CodeVisitorSupport.java:86)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitBlockStatement(ClassCodeVisitorSupport.java:168)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitBlockStatement(StaticTypeCheckingVisitor.java:3971)
at
org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:70)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:142)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:115)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitConstructorOrMethod(StaticTypeCheckingVisitor.java:2601)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:110)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.startMethodInference(StaticTypeCheckingVisitor.java:2590)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitMethod(StaticTypeCheckingVisitor.java:2564)
at
org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitMethod(StaticCompilationVisitor.java:239)
at org.codehaus.groovy.ast.ClassNode.visitMethods(ClassNode.java:1133)
at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1126)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:52)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitClass(StaticTypeCheckingVisitor.java:439)
at
org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitClass(StaticCompilationVisitor.java:197)
at
org.codehaus.groovy.transform.sc.StaticCompileTransformation.visit(StaticCompileTransformation.java:68)
at
org.codehaus.groovy.control.customizers.ASTTransformationCustomizer.call(ASTTransformationCustomizer.groovy:298)
at
org.codehaus.groovy.control.CompilationUnit$IPrimaryClassNodeOperation.doPhaseOperation(CompilationUnit.java:911)
at
org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:653)
at
org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:630)
at
org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:609)
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)
1 error
{code}
Tested against master
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