8042741: Java 8 compiler throws NullPointerException depending location in source file
Reviewed-by: vromero, jlahoda
--- a/langtools/src/share/classes/com/sun/tools/javac/comp/Flow.java Tue May 27 18:57:44 2014 +0100
+++ b/langtools/src/share/classes/com/sun/tools/javac/comp/Flow.java Tue May 27 22:26:53 2014 +0100
@@ -231,7 +231,8 @@
}
}
- public List<Type> analyzeLambdaThrownTypes(Env<AttrContext> env, JCLambda that, TreeMaker make) {
+ public List<Type> analyzeLambdaThrownTypes(final Env<AttrContext> env,
+ JCLambda that, TreeMaker make) {
//we need to disable diagnostics temporarily; the problem is that if
//a lambda expression contains e.g. an unreachable statement, an error
//message will be reported and will cause compilation to skip the flow analyis
@@ -239,7 +240,13 @@
//related errors, which will allow for more errors to be detected
Log.DiagnosticHandler diagHandler = new Log.DiscardDiagnosticHandler(log);
try {
- new AssignAnalyzer(log, syms, lint, names, enforceThisDotInit).analyzeTree(env);
+ new AssignAnalyzer(log, syms, lint, names, enforceThisDotInit) {
+ @Override
+ protected boolean trackable(VarSymbol sym) {
+ return !env.info.scope.includes(sym) &&
+ sym.owner.kind == MTH;
+ }
+ }.analyzeTree(env);
LambdaFlowAnalyzer flowAnalyzer = new LambdaFlowAnalyzer();
flowAnalyzer.analyzeTree(env, that, make);
return flowAnalyzer.inferredThrownTypes;
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/flow/T8042741/A.java Tue May 27 22:26:53 2014 +0100
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2014, 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.
+ */
+
+// str must be at absolute position greater than that of lambda
+// expression in PositionTest.java
+// padding..........................................................padding
+// padding..........................................................padding
+// padding..........................................................padding
+// padding..........................................................padding
+// padding..........................................................padding
+
+public class A {
+ public final String str;
+ {
+ str = "";
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/flow/T8042741/PositionTest.java Tue May 27 22:26:53 2014 +0100
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2014, 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 8042741
+ * @summary Java 8 compiler throws NullPointerException depending location in source file
+ * @compile A.java PositionTest.java
+ */
+
+public class PositionTest extends A {
+ <E extends Exception> void test(SAM<E> r) throws E {
+ test(() -> { System.err.println(str); });
+ }
+ interface SAM<E extends Exception> {
+ public void run() throws E;
+ }
+ void f() {
+ try {
+ test(() -> {
+ test(() -> {
+ try {
+ test(() -> { System.err.println(str); });
+ System.err.println(str);
+ } catch (Exception e) {}
+ System.err.println(str);
+ });
+ System.err.println(str);
+ });
+ } catch (Exception e) { }
+ }
+ void g() throws Exception {
+ test(() -> {
+ try {
+ try {
+ test(() -> { System.err.println(str); });
+ } catch (Exception e) {}
+ System.err.println(str);
+ } catch (Exception e) {}
+ System.err.println(str);
+ });
+ }
+}