8301580: Error recovery does not clear returnResult

Reviewed-by: vromero

src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -5219,7 +5219,7 @@ public void visitAnnotatedType(JCAnnotatedType tree) {
 
     public void visitErroneous(JCErroneous tree) {
         if (tree.errs != null) {
-            Env<AttrContext> errEnv = env.dup(env.tree);
+            Env<AttrContext> errEnv = env.dup(env.tree, env.info.dup());
             errEnv.info.returnResult = unknownExprInfo;
             for (JCTree err : tree.errs)
                 attribTree(err, errEnv, new ResultInfo(KindSelector.ERR, pt()));

test/langtools/jdk/jshell/SnippetHighlightTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 8274148
+ * @bug 8274148 8301580
  * @summary Check snippet highlighting
  * @library /tools/lib
  * @modules jdk.compiler/com.sun.tools.javac.api
@@ -99,6 +99,21 @@ public void testMemberExpr() {
                          "Highlight[start=5, end=11, attributes=[DECLARATION]]");
     }
 
+    public void testClassErrorRecovery() { //JDK-8301580
+        assertHighlights("""
+                         class C {
+                            void m
+                            {
+                                return ;
+                            }
+                         }
+                         """,
+                         "Highlight[start=0, end=5, attributes=[KEYWORD]]",
+                         "Highlight[start=6, end=7, attributes=[DECLARATION]]",
+                         "Highlight[start=13, end=17, attributes=[KEYWORD]]",
+                         "Highlight[start=32, end=38, attributes=[KEYWORD]]");
+    }
+
     private void assertHighlights(String code, String... expected) {
         List<String> completions = computeHighlights(code);
         assertEquals(completions, Arrays.asList(expected), "Input: " + code + ", " + completions.toString());

test/langtools/tools/javac/recovery/AttrRecovery.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8301580
+ * @summary Verify error recovery w.r.t. Attr
+ * @library /tools/lib
+ * @modules jdk.compiler/com.sun.tools.javac.api
+ *          jdk.compiler/com.sun.tools.javac.main
+ *          jdk.jdeps/com.sun.tools.classfile
+ * @build toolbox.ToolBox toolbox.JavacTask
+ * @run main AttrRecovery
+ */
+
+import java.nio.file.Path;
+import java.util.List;
+import java.util.Objects;
+
+import toolbox.JavacTask;
+import toolbox.Task.Expect;
+import toolbox.Task.OutputKind;
+import toolbox.TestRunner;
+import toolbox.ToolBox;
+
+public class AttrRecovery extends TestRunner {
+
+    ToolBox tb;
+
+    public AttrRecovery() {
+        super(System.err);
+        tb = new ToolBox();
+    }
+
+    public static void main(String[] args) throws Exception {
+        AttrRecovery t = new AttrRecovery();
+        t.runTests();
+    }
+
+    @Test
+    public void testFlowExits() throws Exception {
+        String code = """
+                      class C {
+                          void build
+                          {
+                              return ;
+                          }
+                      }
+                      """;
+        Path curPath = Path.of(".");
+        List<String> actual = new JavacTask(tb)
+                .options("-XDrawDiagnostics", "-XDdev", "-XDshould-stop.at=FLOW")
+                .sources(code)
+                .outdir(curPath)
+                .run(Expect.FAIL)
+                .getOutputLines(OutputKind.DIRECT);
+
+        List<String> expected = List.of(
+                "C.java:3:5: compiler.err.expected: '('",
+                "C.java:4:9: compiler.err.ret.outside.meth",
+                "2 errors"
+        );
+
+        if (!Objects.equals(actual, expected)) {
+            error("Expected: " + expected + ", but got: " + actual);
+        }
+    }
+
+}