8037935: Javac -- final local String var referenced in binary/unary op in lambda produces code that does not verify
Summary: Remove over-zealous Attr optimization breaking lambdas
Reviewed-by: jjg, vromero
--- a/langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java Mon Jan 13 14:50:51 2014 -0800
+++ b/langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java Tue Apr 15 15:52:52 2014 -0700
@@ -3011,15 +3011,6 @@
Type ctype = cfolder.fold1(opc, argtype);
if (ctype != null) {
owntype = cfolder.coerce(ctype, owntype);
-
- // Remove constant types from arguments to
- // conserve space. The parser will fold concatenations
- // of string literals; the code here also
- // gets rid of intermediate results when some of the
- // operands are constant identifiers.
- if (tree.arg.type.tsym == syms.stringType.tsym) {
- tree.arg.type = syms.stringType;
- }
}
}
}
@@ -3053,18 +3044,6 @@
Type ctype = cfolder.fold2(opc, left, right);
if (ctype != null) {
owntype = cfolder.coerce(ctype, owntype);
-
- // Remove constant types from arguments to
- // conserve space. The parser will fold concatenations
- // of string literals; the code here also
- // gets rid of intermediate results when some of the
- // operands are constant identifiers.
- if (tree.lhs.type.tsym == syms.stringType.tsym) {
- tree.lhs.type = syms.stringType;
- }
- if (tree.rhs.type.tsym == syms.stringType.tsym) {
- tree.rhs.type = syms.stringType;
- }
}
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/lambda/T8037935/LambdaWithBinOpConstRefToConstString.java Tue Apr 15 15:52:52 2014 -0700
@@ -0,0 +1,43 @@
+/*
+ * 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 8037935
+ * @summary Javac: final local String var referenced in binary/unary op in lambda produces code that does not verify
+ * @run main LambdaWithBinOpConstRefToConstString
+ */
+
+interface MyFI {
+ void accept();
+}
+
+public class LambdaWithBinOpConstRefToConstString {
+ public static void main(String[] args) {
+ final String CONSTANT_STRING_VALUE = "mwmwm";
+
+ MyFI consumeStrings = () -> {
+ System.out.println(" local constant: " + CONSTANT_STRING_VALUE);
+ };
+ }
+}