Thodoris Sotiropoulos created GROOVY-10869:
----------------------------------------------
Summary: NullPointerException in instruction selection phase when
having parameterized method
Key: GROOVY-10869
URL: https://issues.apache.org/jira/browse/GROOVY-10869
Project: Groovy
Issue Type: Bug
Components: Static compilation, Static Type Checker
Reporter: Thodoris Sotiropoulos
The following (complicated) test case makes the compiler produce an
NullPointerException:
{code}
class Foo<T> {
Foo(T x) {}
<T extends Short> T m(T x) {
x
}
}
class Test {
static final void test() {
Foo<Integer> tmp = new Foo<Integer>(-76);
boolean cond = 5.0 > tmp.m(new Foo<Integer>(95).m(null));
}
}
{code}
This is the stacktrace:
{code}
>>> a serious error occurred: BUG! exception in phase 'instruction selection'
>>> in source unit 'test.groovy' unexpected NullPointerException
>>> stacktrace:
BUG! exception in phase 'instruction selection' in source unit 'test.groovy'
unexpected NullPointerException
at
org.codehaus.groovy.control.CompilationUnit$IPrimaryClassNodeOperation.doPhaseOperation(CompilationUnit.java:942)
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)
Caused by: java.lang.NullPointerException
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.getPrimitiveDistance(StaticTypeCheckingSupport.java:919)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.getDistance(StaticTypeCheckingSupport.java:935)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.allParametersAndArgumentsMatch(StaticTypeCheckingSupport.java:377)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.measureParametersAndArgumentsDistance(StaticTypeCheckingSupport.java:1118)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.chooseBestMethods(StaticTypeCheckingSupport.java:1072)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.chooseBestMethod(StaticTypeCheckingSupport.java:1049)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.findMethod(StaticTypeCheckingVisitor.java:4859)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.findMethodOrFail(StaticTypeCheckingVisitor.java:4596)
at
org.codehaus.groovy.transform.sc.StaticCompilationVisitor.findMethodOrFail(StaticCompilationVisitor.java:369)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.getResultType(StaticTypeCheckingVisitor.java:4440)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitBinaryExpression(StaticTypeCheckingVisitor.java:843)
at
org.codehaus.groovy.ast.expr.BinaryExpression.visit(BinaryExpression.java:57)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitBinaryExpression(StaticTypeCheckingVisitor.java:828)
at
org.codehaus.groovy.ast.CodeVisitorSupport.visitDeclarationExpression(CodeVisitorSupport.java:356)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitDeclarationExpression(ClassCodeVisitorSupport.java:161)
at
org.codehaus.groovy.ast.expr.DeclarationExpression.visit(DeclarationExpression.java:92)
at
org.codehaus.groovy.ast.CodeVisitorSupport.visitExpressionStatement(CodeVisitorSupport.java:117)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitExpressionStatement(ClassCodeVisitorSupport.java:212)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitExpressionStatement(StaticTypeCheckingVisitor.java:2193)
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:175)
at
org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:70)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:139)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:118)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.lambda$visitConstructorOrMethod$27(StaticTypeCheckingVisitor.java:2622)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.doWithTypeCheckingExtensions(StaticTypeCheckingVisitor.java:457)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitConstructorOrMethod(StaticTypeCheckingVisitor.java:2622)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:110)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.startMethodInference(StaticTypeCheckingVisitor.java:2605)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitMethod(StaticTypeCheckingVisitor.java:2584)
at
org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitConstructorOrMethod(StaticCompilationVisitor.java:189)
at
org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitMethod(StaticCompilationVisitor.java:204)
at org.codehaus.groovy.ast.ClassNode.visitMethods(ClassNode.java:1143)
at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1136)
at
org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:52)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.lambda$visitClass$3(StaticTypeCheckingVisitor.java:493)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.doWithTypeCheckingExtensions(StaticTypeCheckingVisitor.java:457)
at
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitClass(StaticTypeCheckingVisitor.java:493)
at
org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitClass(StaticCompilationVisitor.java:151)
at
org.codehaus.groovy.transform.sc.StaticCompileTransformation.visit(StaticCompileTransformation.java:68)
at
org.codehaus.groovy.control.customizers.ASTTransformationCustomizer.call(ASTTransformationCustomizer.groovy:303)
at
org.codehaus.groovy.control.CompilationUnit$IPrimaryClassNodeOperation.doPhaseOperation(CompilationUnit.java:937)
... 8 more
{code}
Tested against master (commit: d7fa923bed20945074a41c54cce5133cc2ab63a0)
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