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8381642: javac provides the wrong line number for an error in a lambda expression
Reviewed-by: mcimadamore
This commit is contained in:
Dusan Balek
Maurizio Cimadamore
parent
a37fd2b7c7
commit
96f2cba774
@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -565,7 +565,7 @@ public class ArgumentAttr extends JCTree.Visitor {
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Type lambdaType = targetInfo.descriptor;
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Type currentTarget = targetInfo.target;
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//check compatibility
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checkLambdaCompatible(lambdaType, resultInfo);
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checkLambdaCompatible(lambdaType, currentTarget, resultInfo);
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return currentTarget;
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} catch (FunctionDescriptorLookupError ex) {
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resultInfo.checkContext.report(null, ex.getDiagnostic());
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@ -574,7 +574,7 @@ public class ArgumentAttr extends JCTree.Visitor {
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}
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/** Check lambda against given target result */
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private void checkLambdaCompatible(Type descriptor, ResultInfo resultInfo) {
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private void checkLambdaCompatible(Type descriptor, Type target, ResultInfo resultInfo) {
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CheckContext checkContext = resultInfo.checkContext;
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ResultInfo bodyResultInfo = attr.lambdaBodyResult(speculativeTree, descriptor, resultInfo);
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switch (speculativeTree.getBodyKind()) {
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@ -588,7 +588,7 @@ public class ArgumentAttr extends JCTree.Visitor {
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break;
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}
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attr.checkLambdaCompatible(speculativeTree, descriptor, checkContext);
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attr.checkLambdaCompatible(speculativeTree, descriptor, target.tsym, checkContext);
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}
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/**
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@ -3241,7 +3241,7 @@ public class Attr extends JCTree.Visitor {
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attribStats(that.params, localEnv);
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if (arityMismatch) {
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resultInfo.checkContext.report(that, diags.fragment(Fragments.IncompatibleArgTypesInLambda));
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resultInfo.checkContext.report(that, diags.fragment(Fragments.WrongNumberArgsInLambda(currentTarget.tsym)));
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result = that.type = types.createErrorType(currentTarget);
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return;
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}
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@ -3274,7 +3274,7 @@ public class Attr extends JCTree.Visitor {
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flow.analyzeLambda(env, that, make, isSpeculativeRound);
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that.type = currentTarget; //avoids recovery at this stage
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checkLambdaCompatible(that, lambdaType, resultInfo.checkContext);
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checkLambdaCompatible(that, lambdaType, currentTarget.tsym, resultInfo.checkContext);
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if (!isSpeculativeRound) {
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//add thrown types as bounds to the thrown types free variables if needed:
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@ -3550,7 +3550,7 @@ public class Attr extends JCTree.Visitor {
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* (i) parameter types must be identical to those of the target descriptor; (ii) return
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* types must be compatible with the return type of the expected descriptor.
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*/
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void checkLambdaCompatible(JCLambda tree, Type descriptor, CheckContext checkContext) {
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void checkLambdaCompatible(JCLambda tree, Type descriptor, TypeSymbol target, CheckContext checkContext) {
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Type returnType = checkContext.inferenceContext().asUndetVar(descriptor.getReturnType());
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//return values have already been checked - but if lambda has no return
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@ -3567,7 +3567,9 @@ public class Attr extends JCTree.Visitor {
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List<Type> argTypes = checkContext.inferenceContext().asUndetVars(descriptor.getParameterTypes());
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if (!types.isSameTypes(argTypes, TreeInfo.types(tree.params))) {
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checkContext.report(tree, diags.fragment(Fragments.IncompatibleArgTypesInLambda));
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checkContext.report(tree, diags.fragment(argTypes.size() != tree.params.size()
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? Fragments.WrongNumberArgsInLambda(target)
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: Fragments.IncompatibleArgTypesInLambda(argTypes, TreeInfo.types(tree.params))));
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}
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}
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2012, 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -427,7 +427,7 @@ public class DeferredAttr extends JCTree.Visitor {
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ListBuffer<JCStatement> stats = new ListBuffer<>();
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stats.addAll(that.params);
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if (that.getBodyKind() == JCLambda.BodyKind.EXPRESSION) {
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stats.add(make.Return((JCExpression)that.body));
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stats.add(make.at(that.pos).Return((JCExpression)that.body));
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} else {
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stats.add((JCBlock)that.body);
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}
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@ -444,7 +444,7 @@ public class DeferredAttr extends JCTree.Visitor {
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if (lambdaBody.hasTag(Tag.RETURN)) {
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lambdaBody = ((JCReturn)lambdaBody).expr;
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}
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JCLambda speculativeLambda = make.Lambda(args, lambdaBody);
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JCLambda speculativeLambda = make.at(that.pos).Lambda(args, lambdaBody);
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attr.preFlow(speculativeLambda);
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flow.analyzeLambda(env, speculativeLambda, make, false);
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return speculativeLambda;
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@ -845,7 +845,7 @@ public class DeferredAttr extends JCTree.Visitor {
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if (descriptorType.getParameterTypes().length() != tree.params.length()) {
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checkContext.report(tree,
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diags.fragment(Fragments.IncompatibleArgTypesInLambda));
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diags.fragment(Fragments.WrongNumberArgsInLambda(pt.tsym)));
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}
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Type currentReturnType = descriptorType.getReturnType();
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 1999, 2024, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 1999, 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -635,7 +635,7 @@ public class Infer {
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//in the functional interface descriptors)
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List<Type> descParameterTypes = types.findDescriptorType(formalInterface).getParameterTypes();
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if (descParameterTypes.size() != paramTypes.size()) {
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checkContext.report(pos, diags.fragment(Fragments.IncompatibleArgTypesInLambda));
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checkContext.report(pos, diags.fragment(Fragments.WrongNumberArgsInLambda(funcInterface.tsym)));
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return types.createErrorType(funcInterface);
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}
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for (Type p : descParameterTypes) {
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@ -996,8 +996,15 @@ compiler.err.lambda.body.neither.value.nor.void.compatible=\
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compiler.err.incompatible.thrown.types.in.mref=\
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incompatible thrown types {0} in functional expression
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# 0: list of type or message segment, 1: list of type or message segment
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compiler.misc.incompatible.arg.types.in.lambda=\
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incompatible parameter types in lambda expression
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incompatible parameter types in lambda expression\n\
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required: {0}\n\
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found: {1}
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# 0: symbol
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compiler.misc.wrong.number.args.in.lambda=\
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wrong number of parameters in lambda expression for functional interface {0}
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compiler.misc.incompatible.arg.types.in.mref=\
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incompatible parameter types in method reference
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@ -0,0 +1,112 @@
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/*
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* Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8381642
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* @summary IncompatibleArgTypesInLambda error reported at wrong position
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* @library /tools/lib
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* @modules
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* jdk.compiler/com.sun.tools.javac.api
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* jdk.compiler/com.sun.tools.javac.main
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* @build toolbox.ToolBox toolbox.JavacTask
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* @run junit ${test.main.class}
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*/
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.List;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.TestInfo;
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import toolbox.JavacTask;
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import toolbox.Task;
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import toolbox.ToolBox;
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public class IncompatibleArgTypesInLambda {
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private static String SOURCE = """
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import java.util.function.Supplier;
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import javax.swing.JButton;
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public class Test {
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public void test(Supplier<String> sup) {
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JButton button = new JButton("test");
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button.addActionListener(() -> {
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String s = (sup != null)
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? sup.get()
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: "";
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IO.println(s);
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});
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}
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}
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""";
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private Path base;
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private ToolBox tb = new ToolBox();
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@Test
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public void testCompactDiags() throws Exception {
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Path classes = base.resolve("classes");
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Files.createDirectories(classes);
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List<String> log = new JavacTask(tb)
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.options("-d", classes.toString(), "-XDrawDiagnostics", "-Xdiags:compact")
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.sources(SOURCE)
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.run(Task.Expect.FAIL)
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.writeAll()
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.getOutputLines(Task.OutputKind.DIRECT);
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List<String> expected = List.of(
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"Test.java:8:34: compiler.err.prob.found.req: (compiler.misc.wrong.number.args.in.lambda: java.awt.event.ActionListener)",
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"- compiler.note.compressed.diags",
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"1 error"
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);
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tb.checkEqual(expected, log);
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}
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@Test
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public void testVerboseDiags() throws Exception {
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Path classes = base.resolve("classes");
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Files.createDirectories(classes);
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List<String> log = new JavacTask(tb)
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.options("-d", classes.toString(), "-XDrawDiagnostics", "-Xdiags:verbose")
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.sources(SOURCE)
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.run(Task.Expect.FAIL)
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.writeAll()
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.getOutputLines(Task.OutputKind.DIRECT);
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List<String> expected = List.of(
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"Test.java:8:15: compiler.err.cant.apply.symbol: kindname.method, addActionListener, java.awt.event.ActionListener, @34, kindname.class, javax.swing.AbstractButton, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.wrong.number.args.in.lambda: java.awt.event.ActionListener))",
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"1 error"
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);
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tb.checkEqual(expected, log);
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}
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@BeforeEach
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public void setUp(TestInfo info) {
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base = Paths.get(".")
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.resolve(info.getTestMethod()
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.orElseThrow()
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.getName());
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}
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}
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@ -1,2 +1,2 @@
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FlowCrashTest.java:18:42: compiler.err.cant.apply.symbols: kindname.method, toMap, @49,@19:49,@20:49,{(compiler.misc.inapplicable.method: kindname.method, java.util.stream.Collectors, <T,K,U>toMap(java.util.function.Function<? super T,? extends K>,java.util.function.Function<? super T,? extends U>), (compiler.misc.infer.arg.length.mismatch: T,K,U)),(compiler.misc.inapplicable.method: kindname.method, java.util.stream.Collectors, <T,K,U>toMap(java.util.function.Function<? super T,? extends K>,java.util.function.Function<? super T,? extends U>,java.util.function.BinaryOperator<U>), (compiler.misc.infer.no.conforming.assignment.exists: T,K,U, (compiler.misc.incompatible.arg.types.in.lambda))),(compiler.misc.inapplicable.method: kindname.method, java.util.stream.Collectors, <T,K,U,M>toMap(java.util.function.Function<? super T,? extends K>,java.util.function.Function<? super T,? extends U>,java.util.function.BinaryOperator<U>,java.util.function.Supplier<M>), (compiler.misc.infer.arg.length.mismatch: T,K,U,M))}
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FlowCrashTest.java:18:42: compiler.err.cant.apply.symbols: kindname.method, toMap, @49,@19:49,@20:49,{(compiler.misc.inapplicable.method: kindname.method, java.util.stream.Collectors, <T,K,U>toMap(java.util.function.Function<? super T,? extends K>,java.util.function.Function<? super T,? extends U>), (compiler.misc.infer.arg.length.mismatch: T,K,U)),(compiler.misc.inapplicable.method: kindname.method, java.util.stream.Collectors, <T,K,U>toMap(java.util.function.Function<? super T,? extends K>,java.util.function.Function<? super T,? extends U>,java.util.function.BinaryOperator<U>), (compiler.misc.infer.no.conforming.assignment.exists: T,K,U, (compiler.misc.wrong.number.args.in.lambda: java.util.function.Function))),(compiler.misc.inapplicable.method: kindname.method, java.util.stream.Collectors, <T,K,U,M>toMap(java.util.function.Function<? super T,? extends K>,java.util.function.Function<? super T,? extends U>,java.util.function.BinaryOperator<U>,java.util.function.Supplier<M>), (compiler.misc.infer.arg.length.mismatch: T,K,U,M))}
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1 error
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@ -0,0 +1,36 @@
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/*
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* Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
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* version 2 for more details (a copy is included in the LICENSE file that
|
||||
* accompanied this code).
|
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*
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* You should have received a copy of the GNU General Public License version
|
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* 2 along with this work; if not, write to the Free Software Foundation,
|
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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// key: compiler.err.cant.apply.symbol
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// key: compiler.misc.no.conforming.assignment.exists
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// key: compiler.misc.wrong.number.args.in.lambda
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class WrongNumberArgsInLambda {
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interface SAM {
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void m(Integer x);
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}
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void op(SAM s) {}
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void test() {
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op((x, y) -> {});
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}
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}
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@ -2,7 +2,7 @@ T8202372.java:26:13: compiler.err.cant.apply.symbol: kindname.method, addVoid, T
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T8202372.java:27:13: compiler.err.cant.apply.symbol: kindname.method, addVoid, T8202372.VoidFunc, @22, kindname.class, T8202372, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.ret.type.in.lambda: (compiler.misc.unexpected.ret.val)))
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T8202372.java:35:13: compiler.err.cant.apply.symbol: kindname.method, addNonVoid, T8202372.NonVoidFunc, @25, kindname.class, T8202372, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.ret.type.in.lambda: (compiler.misc.missing.ret.val: java.lang.String)))
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T8202372.java:36:13: compiler.err.cant.apply.symbol: kindname.method, addNonVoid, T8202372.NonVoidFunc, @25, kindname.class, T8202372, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.ret.type.in.lambda: (compiler.misc.missing.ret.val)))
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T8202372.java:40:13: compiler.err.cant.apply.symbol: kindname.method, addParam, T8202372.ParamFunc, @23, kindname.class, T8202372, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.arg.types.in.lambda))
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T8202372.java:42:13: compiler.err.cant.apply.symbol: kindname.method, addParam, T8202372.ParamFunc, @23, kindname.class, T8202372, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.arg.types.in.lambda))
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T8202372.java:43:13: compiler.err.cant.apply.symbol: kindname.method, addParam, T8202372.ParamFunc, @23, kindname.class, T8202372, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.arg.types.in.lambda))
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T8202372.java:40:13: compiler.err.cant.apply.symbol: kindname.method, addParam, T8202372.ParamFunc, @23, kindname.class, T8202372, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.wrong.number.args.in.lambda: T8202372.ParamFunc))
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T8202372.java:42:13: compiler.err.cant.apply.symbol: kindname.method, addParam, T8202372.ParamFunc, @23, kindname.class, T8202372, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.wrong.number.args.in.lambda: T8202372.ParamFunc))
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T8202372.java:43:13: compiler.err.cant.apply.symbol: kindname.method, addParam, T8202372.ParamFunc, @23, kindname.class, T8202372, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.arg.types.in.lambda: java.lang.String, int))
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7 errors
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@ -1,3 +1,3 @@
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BadNestedLambda.java:9:35: compiler.err.prob.found.req: (compiler.misc.incompatible.ret.type.in.lambda: (compiler.misc.not.a.functional.intf: void))
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BadNestedLambda.java:9:24: compiler.err.prob.found.req: (compiler.misc.incompatible.arg.types.in.lambda)
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BadNestedLambda.java:9:24: compiler.err.prob.found.req: (compiler.misc.wrong.number.args.in.lambda: java.lang.Runnable)
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2 errors
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@ -1,4 +1,4 @@
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BadRecovery.java:17:9: compiler.err.cant.apply.symbol: kindname.method, m, BadRecovery.SAM1, @11, kindname.class, BadRecovery, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.arg.types.in.lambda))
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BadRecovery.java:17:9: compiler.err.cant.apply.symbol: kindname.method, m, BadRecovery.SAM1, @11, kindname.class, BadRecovery, (compiler.misc.no.conforming.assignment.exists: (compiler.misc.wrong.number.args.in.lambda: BadRecovery.SAM1))
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BadRecovery.java:17:38: compiler.err.cant.resolve.location.args: kindname.method, someMemberOfReceiver, , @60, (compiler.misc.location.1: kindname.variable, receiver, java.lang.Object)
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BadRecovery.java:17:77: compiler.err.cant.resolve.location: kindname.variable, f, , , (compiler.misc.location: kindname.class, BadRecovery, null)
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3 errors
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@ -1,2 +1,2 @@
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LambdaConv10.java:15:39: compiler.err.prob.found.req: (compiler.misc.incompatible.arg.types.in.lambda)
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LambdaConv10.java:15:39: compiler.err.prob.found.req: (compiler.misc.incompatible.arg.types.in.lambda: java.lang.Integer, int)
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1 error
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@ -1,3 +1,3 @@
|
||||
TargetType44.java:22:9: compiler.err.cant.apply.symbols: kindname.method, m, @11,{(compiler.misc.inapplicable.method: kindname.method, TargetType44, m(TargetType44.Unary), (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.arg.types.in.lambda))),(compiler.misc.inapplicable.method: kindname.method, TargetType44, m(TargetType44.Binary), (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.arg.types.in.lambda)))}
|
||||
TargetType44.java:25:9: compiler.err.cant.apply.symbols: kindname.method, m, @11,{(compiler.misc.inapplicable.method: kindname.method, TargetType44, m(TargetType44.Unary), (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.arg.types.in.lambda))),(compiler.misc.inapplicable.method: kindname.method, TargetType44, m(TargetType44.Binary), (compiler.misc.no.conforming.assignment.exists: (compiler.misc.incompatible.arg.types.in.lambda)))}
|
||||
TargetType44.java:22:9: compiler.err.cant.apply.symbols: kindname.method, m, @11,{(compiler.misc.inapplicable.method: kindname.method, TargetType44, m(TargetType44.Unary), (compiler.misc.no.conforming.assignment.exists: (compiler.misc.wrong.number.args.in.lambda: TargetType44.Unary))),(compiler.misc.inapplicable.method: kindname.method, TargetType44, m(TargetType44.Binary), (compiler.misc.no.conforming.assignment.exists: (compiler.misc.wrong.number.args.in.lambda: TargetType44.Binary)))}
|
||||
TargetType44.java:25:9: compiler.err.cant.apply.symbols: kindname.method, m, @11,{(compiler.misc.inapplicable.method: kindname.method, TargetType44, m(TargetType44.Unary), (compiler.misc.no.conforming.assignment.exists: (compiler.misc.wrong.number.args.in.lambda: TargetType44.Unary))),(compiler.misc.inapplicable.method: kindname.method, TargetType44, m(TargetType44.Binary), (compiler.misc.no.conforming.assignment.exists: (compiler.misc.wrong.number.args.in.lambda: TargetType44.Binary)))}
|
||||
2 errors
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
VoidLambdaParameter.java:7:19: compiler.err.void.not.allowed.here
|
||||
VoidLambdaParameter.java:7:18: compiler.err.prob.found.req: (compiler.misc.incompatible.arg.types.in.lambda)
|
||||
VoidLambdaParameter.java:7:18: compiler.err.prob.found.req: (compiler.misc.wrong.number.args.in.lambda: java.lang.Runnable)
|
||||
VoidLambdaParameter.java:8:12: compiler.err.void.not.allowed.here
|
||||
VoidLambdaParameter.java:10:23: compiler.err.void.not.allowed.here
|
||||
4 errors
|
||||
|
||||
@ -1,2 +1,2 @@
|
||||
InvalidExpression4.java:16:17: compiler.err.prob.found.req: (compiler.misc.incompatible.arg.types.in.lambda)
|
||||
InvalidExpression4.java:16:17: compiler.err.prob.found.req: (compiler.misc.incompatible.arg.types.in.lambda: int, java.lang.Integer)
|
||||
1 error
|
||||
|
||||
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Reference in New Issue
Block a user