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6507024: casting an array to a generic type results in a 'capture#69 of ?' type error

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Types.isSubtypeUnchecked() should handle type-variables subtyping properly

Reviewed-by: jjg
This commit is contained in:
Maurizio Cimadamore 2008-05-30 10:42:43 +01:00
parent 617daebc69
commit afb636d599
2 changed files with 42 additions and 1 deletions
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6
langtools/src/share/classes/com/sun/tools/javac/code/Types.java
View File

@ -301,7 +301,11 @@ public class Types {
: isSubtypeUnchecked(elemtype(t), elemtype(s), warn); : isSubtypeUnchecked(elemtype(t), elemtype(s), warn);
} else if (isSubtype(t, s)) { } else if (isSubtype(t, s)) {
return true; return true;
} else if (!s.isRaw()) { }
else if (t.tag == TYPEVAR) {
return isSubtypeUnchecked(t.getUpperBound(), s, warn);
}
else if (!s.isRaw()) {
Type t2 = asSuper(t, s.tsym); Type t2 = asSuper(t, s.tsym);
if (t2 != null && t2.isRaw()) { if (t2 != null && t2.isRaw()) {
if (isReifiable(s)) if (isReifiable(s))

37
langtools/test/tools/javac/generics/T6507024.java Normal file
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@ -0,0 +1,37 @@
/*
* Copyright 2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @test
* @bug 6507024
* @summary unchecked conversion between arrays fails after capture conversion
* @author Maurizio Cimadamore
*
* @compile T6507024.java
*/
public class T6507024<T> {
<Z> void m(T6507024<Z>[] results) {
T6507024<Z>[] r = results.getClass().cast(null);
}
}