6450290: Capture of nested wildcards causes type error
A missing capture conversion makes javac to think that some expressions are well-formed even when they aren't Reviewed-by: jjg
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langtools
@ -1878,8 +1878,10 @@ public class Attr extends JCTree.Visitor {
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boolean varArgs = env.info.varArgs;
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tree.sym = sym;
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if (site.tag == TYPEVAR && !isType(sym) && sym.kind != ERR)
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site = capture(site.getUpperBound());
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if (site.tag == TYPEVAR && !isType(sym) && sym.kind != ERR) {
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while (site.tag == TYPEVAR) site = site.getUpperBound();
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site = capture(site);
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}
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// If that symbol is a variable, ...
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if (sym.kind == VAR) {
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44
langtools/test/tools/javac/generics/wildcards/T6450290.java
Normal file
44
langtools/test/tools/javac/generics/wildcards/T6450290.java
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@ -0,0 +1,44 @@
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/*
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* Copyright 2004-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/*
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* @test
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* @bug 6450290
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* @summary Capture of nested wildcards causes type error
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* @author Maurizio Cimadamore
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* @compile/fail T6450290.java
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*/
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public class T6450290 {
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static class Box<X extends Box<?,?>, T extends X> {
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T value;
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Box<X, T> same;
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}
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static class A extends Box<A,A> {}
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static class B extends Box<B,B> {}
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public static void main(String[] args) {
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Box<?,?> b = new Box<Box<A,A>,Box<A,A>>();
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b.value.same = new Box<B,B>(); //javac misses this bad assignment
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}
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}
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