8214071: Broken msg.bug diagnostics when using the compiler API

Reviewed-by: jjg

src/jdk.compiler/share/classes/com/sun/tools/javac/api/JavacTaskImpl.java

@@ -172,7 +172,7 @@ public class JavacTaskImpl extends BasicJavacTask {
             if (compiler == null || compiler.errorCount() == 0
                     || Options.instance(context).isSet("dev")) {
                 Log log = Log.instance(context);
-                log.printLines("msg.bug", JavaCompiler.version());
+                log.printLines(PrefixKind.JAVAC, "msg.bug", JavaCompiler.version());
                 ex.printStackTrace(log.getWriter(WriterKind.NOTICE));
             }
             return abnormalErrorResult;

test/langtools/tools/javac/api/CrashReport.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2018, Google LLC. 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     8214071
+ * @summary Broken msg.bug diagnostics when using the compiler API
+ * @library lib
+ * @modules jdk.compiler/com.sun.tools.javac.api
+ * @build ToolTester
+ * @run main CrashReport
+ */
+
+import com.sun.source.util.JavacTask;
+import com.sun.source.util.TaskEvent;
+import com.sun.source.util.TaskListener;
+import com.sun.tools.javac.api.ClientCodeWrapper.Trusted;
+import java.io.File;
+import java.io.StringWriter;
+import java.util.List;
+
+public class CrashReport extends ToolTester {
+
+    public static void main(String[] args) {
+        new CrashReport().test();
+    }
+
+    void test() {
+        StringWriter pw = new StringWriter();
+        JavacTask task =
+                (JavacTask)
+                        tool.getTask(
+                                pw,
+                                fm,
+                                null,
+                                List.of(),
+                                null,
+                                fm.getJavaFileObjects(new File(test_src, "CrashReport.java")));
+        task.addTaskListener(new Listener());
+        boolean ok = task.call();
+        if (ok) {
+            throw new AssertionError("expected compilation to fail");
+        }
+        String output = pw.toString();
+        if (!output.contains("An exception has occurred in the compiler")) {
+            throw new AssertionError("expected msg.bug diagnostic, got:\n" + output);
+        }
+    }
+
+    @Trusted
+    static class Listener implements TaskListener {
+        @Override
+        public void started(TaskEvent e) {
+            throw new AssertionError();
+        }
+    }
+}