--- old/src/share/classes/com/sun/tools/javac/code/Type.java Thu Aug 20 03:12:18 2015 +++ new/src/share/classes/com/sun/tools/javac/code/Type.java Thu Aug 20 03:12:18 2015 @@ -421,6 +421,14 @@ && (tsym.flags() & COMPOUND) != 0; } + public boolean isIntersection() { + return false; + } + + public boolean isUnion() { + return false; + } + public boolean isInterface() { return (tsym.flags() & INTERFACE) != 0; } @@ -970,6 +978,11 @@ } @Override + public boolean isUnion() { + return true; + } + + @Override public TypeKind getKind() { return TypeKind.UNION; } @@ -1003,6 +1016,11 @@ return interfaces_field.prepend(supertype_field); } + @Override + public boolean isIntersection() { + return true; + } + public List getExplicitComponents() { return allInterfaces ? interfaces_field : --- old/src/share/classes/com/sun/tools/javac/code/Types.java Thu Aug 20 03:12:19 2015 +++ new/src/share/classes/com/sun/tools/javac/code/Types.java Thu Aug 20 03:12:19 2015 @@ -1539,8 +1539,8 @@ } } - if (t.isCompound() || s.isCompound()) { - return !t.isCompound() ? + if (t.isIntersection() || s.isIntersection()) { + return !t.isIntersection() ? visitIntersectionType((IntersectionClassType)s.unannotatedType(), t, true) : visitIntersectionType((IntersectionClassType)t.unannotatedType(), s, false); } @@ -2255,19 +2255,28 @@ } // - // + // /** - * Make a compound type from non-empty list of types. The list should be - * ordered according to {@link Symbol#precedes(TypeSymbol,Types)}. + * Make an intersection type from non-empty list of types. The list should be ordered according to + * {@link TypeSymbol#precedes(TypeSymbol, Types)}. Note that this might cause a symbol completion. + * Hence, this version of makeIntersectionType may not be called during a classfile read. * - * @param bounds the types from which the compound type is formed - * @param supertype is objectType if all bounds are interfaces, - * null otherwise. + * @param bounds the types from which the intersection type is formed */ - public Type makeCompoundType(List bounds) { - return makeCompoundType(bounds, bounds.head.tsym.isInterface()); + public IntersectionClassType makeIntersectionType(List bounds) { + return makeIntersectionType(bounds, bounds.head.tsym.isInterface()); } - public Type makeCompoundType(List bounds, boolean allInterfaces) { + + /** + * Make an intersection type from non-empty list of types. The list should be ordered according to + * {@link TypeSymbol#precedes(TypeSymbol, Types)}. This does not cause symbol completion as + * an extra parameter indicates as to whether all bounds are interfaces - in which case the + * supertype is implicitly assumed to be 'Object'. + * + * @param bounds the types from which the intersection type is formed + * @param allInterfaces are all bounds interface types? + */ + public IntersectionClassType makeIntersectionType(List bounds, boolean allInterfaces) { Assert.check(bounds.nonEmpty()); Type firstExplicitBound = bounds.head; if (allInterfaces) { @@ -2280,23 +2289,24 @@ : names.empty, null, syms.noSymbol); - bc.type = new IntersectionClassType(bounds, bc, allInterfaces); + IntersectionClassType intersectionType = new IntersectionClassType(bounds, bc, allInterfaces); + bc.type = intersectionType; bc.erasure_field = (bounds.head.hasTag(TYPEVAR)) ? syms.objectType : // error condition, recover erasure(firstExplicitBound); bc.members_field = new Scope(bc); - return bc.type; + return intersectionType; } /** - * A convenience wrapper for {@link #makeCompoundType(List)}; the + * A convenience wrapper for {@link #makeIntersectionType(List)}; the * arguments are converted to a list and passed to the other * method. Note that this might cause a symbol completion. - * Hence, this version of makeCompoundType may not be called + * Hence, this version of makeIntersectionType may not be called * during a classfile read. */ - public Type makeCompoundType(Type bound1, Type bound2) { - return makeCompoundType(List.of(bound1, bound2)); + public Type makeIntersectionType(Type bound1, Type bound2) { + return makeIntersectionType(List.of(bound1, bound2)); } // @@ -2436,7 +2446,7 @@ private final UnaryVisitor> directSupertypes = new UnaryVisitor>() { public List visitType(final Type type, final Void ignored) { - if (!type.isCompound()) { + if (!type.isIntersection()) { final Type sup = supertype(type); return (sup == Type.noType || sup == type || sup == null) ? interfaces(type) @@ -2490,12 +2500,14 @@ // /** - * Set the bounds field of the given type variable to reflect a - * (possibly multiple) list of bounds. - * @param t a type variable - * @param bounds the bounds, must be nonempty - * @param supertype is objectType if all bounds are interfaces, - * null otherwise. + * Same as {@link Types#setBounds(TypeVar, List, boolean)}, except that third parameter is computed directly, + * as follows: if all all bounds are interface types, the computed supertype is Object,otherwise + * the supertype is simply left null (in this case, the supertype is assumed to be the head of + * the bound list passed as second argument). Note that this check might cause a symbol completion. + * Hence, this version of setBounds may not be called during a classfile read. + * + * @param t a type variable + * @param bounds the bounds, must be nonempty */ public void setBounds(TypeVar t, List bounds) { setBounds(t, bounds, bounds.head.tsym.isInterface()); @@ -2502,18 +2514,18 @@ } /** - * Same as {@link #setBounds(Type.TypeVar,List,Type)}, except that - * third parameter is computed directly, as follows: if all - * all bounds are interface types, the computed supertype is Object, - * otherwise the supertype is simply left null (in this case, the supertype - * is assumed to be the head of the bound list passed as second argument). - * Note that this check might cause a symbol completion. Hence, this version of - * setBounds may not be called during a classfile read. + * Set the bounds field of the given type variable to reflect a (possibly multiple) list of bounds. + * This does not cause symbol completion as an extra parameter indicates as to whether all bounds + * are interfaces - in which case the supertype is implicitly assumed to be 'Object'. + * + * @param t a type variable + * @param bounds the bounds, must be nonempty + * @param allInterfaces are all bounds interface types? */ public void setBounds(TypeVar t, List bounds, boolean allInterfaces) { t.bound = bounds.tail.isEmpty() ? bounds.head : - makeCompoundType(bounds, allInterfaces); + makeIntersectionType(bounds, allInterfaces); t.rank_field = -1; } // @@ -3063,7 +3075,7 @@ if (st == supertype(t) && is == interfaces(t)) return t; else - return makeCompoundType(is.prepend(st)); + return makeIntersectionType(is.prepend(st)); } } @@ -3566,7 +3578,7 @@ else if (compound.tail.isEmpty()) return compound.head; else - return makeCompoundType(compound); + return makeIntersectionType(compound); } /** @@ -3744,8 +3756,8 @@ synchronized (this) { if (arraySuperType == null) { // JLS 10.8: all arrays implement Cloneable and Serializable. - arraySuperType = makeCompoundType(List.of(syms.serializableType, - syms.cloneableType), true); + arraySuperType = makeIntersectionType(List.of(syms.serializableType, + syms.cloneableType), true); } } } @@ -3811,7 +3823,7 @@ return glbFlattened(union(bounds, lowers), errT); } } - return makeCompoundType(bounds); + return makeIntersectionType(bounds); } // --- old/src/share/classes/com/sun/tools/javac/comp/Attr.java Thu Aug 20 03:12:20 2015 +++ new/src/share/classes/com/sun/tools/javac/comp/Attr.java Thu Aug 20 03:12:20 2015 @@ -2434,7 +2434,7 @@ @Override public Type visitClassType(ClassType t, DiagnosticPosition pos) { - return t.isCompound() ? + return t.isIntersection() ? visitIntersectionClassType((IntersectionClassType)t, pos) : t; } @@ -2465,8 +2465,7 @@ } supertypes.append(i.tsym.type); } - IntersectionClassType notionalIntf = - (IntersectionClassType)types.makeCompoundType(supertypes.toList()); + IntersectionClassType notionalIntf = types.makeIntersectionType(supertypes.toList()); notionalIntf.allparams_field = targs.toList(); notionalIntf.tsym.flags_field |= INTERFACE; return notionalIntf.tsym; @@ -4032,7 +4031,7 @@ } else if (bounds.length() == 1) { return bounds.head.type; } else { - Type owntype = types.makeCompoundType(TreeInfo.types(bounds)); + Type owntype = types.makeIntersectionType(TreeInfo.types(bounds)); // ... the variable's bound is a class type flagged COMPOUND // (see comment for TypeVar.bound). // In this case, generate a class tree that represents the --- old/src/share/classes/com/sun/tools/javac/comp/Check.java Thu Aug 20 03:12:21 2015 +++ new/src/share/classes/com/sun/tools/javac/comp/Check.java Thu Aug 20 03:12:21 2015 @@ -1813,7 +1813,7 @@ Type t1, Type t2) { return checkCompatibleAbstracts(pos, t1, t2, - types.makeCompoundType(t1, t2)); + types.makeIntersectionType(t1, t2)); } public boolean checkCompatibleAbstracts(DiagnosticPosition pos, --- old/src/share/classes/com/sun/tools/javac/comp/Infer.java Thu Aug 20 03:12:22 2015 +++ new/src/share/classes/com/sun/tools/javac/comp/Infer.java Thu Aug 20 03:12:22 2015 @@ -373,7 +373,7 @@ List upperBounds = uv.getBounds(InferenceBound.UPPER); if (Type.containsAny(upperBounds, vars)) { TypeSymbol fresh_tvar = new TypeVariableSymbol(Flags.SYNTHETIC, uv.qtype.tsym.name, null, uv.qtype.tsym.owner); - fresh_tvar.type = new TypeVar(fresh_tvar, types.makeCompoundType(uv.getBounds(InferenceBound.UPPER)), null); + fresh_tvar.type = new TypeVar(fresh_tvar, types.makeIntersectionType(uv.getBounds(InferenceBound.UPPER)), null); todo.append(uv); uv.inst = fresh_tvar.type; } else if (upperBounds.nonEmpty()) { --- old/src/share/classes/com/sun/tools/javac/comp/TransTypes.java Thu Aug 20 03:12:23 2015 +++ new/src/share/classes/com/sun/tools/javac/comp/TransTypes.java Thu Aug 20 03:12:23 2015 @@ -750,7 +750,7 @@ Type originalTarget = tree.type; tree.type = erasure(tree.type); tree.expr = translate(tree.expr, tree.type); - if (originalTarget.isCompound()) { + if (originalTarget.isIntersection()) { Type.IntersectionClassType ict = (Type.IntersectionClassType)originalTarget; for (Type c : ict.getExplicitComponents()) { Type ec = erasure(c); --- /dev/null Thu Aug 20 03:12:24 2015 +++ new/test/tools/javac/multicatch/8071291/T8071291.java Thu Aug 20 03:12:24 2015 @@ -0,0 +1,49 @@ +/* + * Copyright (c) 2015, 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 8071291 + * @summary Compiler crashes trying to cast UnionType to IntersectionClassType + * @compile T8071291.java + */ + +class T8071291 { + + interface A { } + class Exception1 extends Exception implements A { } + class Exception2 extends Exception implements A { } + + void test(boolean cond) { + try { + if (cond) { + throw new Exception1(); + } else { + throw new Exception2(); + } + } + catch (Exception1|Exception2 x) { + if (x instanceof Exception1) { } + } + } +}