6326693: variable x might already have been assigned, when assignment is in catch block

Tue, 02 Jul 2013 22:49:40 +0100

author
vromero
date
Tue, 02 Jul 2013 22:49:40 +0100
changeset 1879
3b4f92a3797f
parent 1878
565341d436e2
child 1880
ce5a90df517b
child 1885
d6158f8d7235

6326693: variable x might already have been assigned, when assignment is in catch block
Reviewed-by: mcimadamore

src/share/classes/com/sun/tools/javac/comp/Flow.java file | annotate | diff | comparison | revisions
test/tools/javac/T6326693/FinalVariableAssignedToInCatchBlockTest.java file | annotate | diff | comparison | revisions
test/tools/javac/T6326693/FinalVariableAssignedToInCatchBlockTest.out file | annotate | diff | comparison | revisions
     1.1 --- a/src/share/classes/com/sun/tools/javac/comp/Flow.java	Mon Jul 01 16:36:08 2013 -0700
     1.2 +++ b/src/share/classes/com/sun/tools/javac/comp/Flow.java	Tue Jul 02 22:49:40 2013 +0100
     1.3 @@ -1945,10 +1945,17 @@
     1.4                  }
     1.5              }
     1.6  
     1.7 +            /*  The analysis of each catch should be independent.
     1.8 +             *  Each one should have the same initial values of inits and
     1.9 +             *  uninits.
    1.10 +             */
    1.11 +            final Bits initsCatchPrev = new Bits(initsTry);
    1.12 +            final Bits uninitsCatchPrev = new Bits(uninitsTry);
    1.13 +
    1.14              for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) {
    1.15                  JCVariableDecl param = l.head.param;
    1.16 -                inits.assign(initsTry);
    1.17 -                uninits.assign(uninitsTry);
    1.18 +                inits.assign(initsCatchPrev);
    1.19 +                uninits.assign(uninitsCatchPrev);
    1.20                  scan(param);
    1.21                  inits.incl(param.sym.adr);
    1.22                  uninits.excl(param.sym.adr);
     2.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     2.2 +++ b/test/tools/javac/T6326693/FinalVariableAssignedToInCatchBlockTest.java	Tue Jul 02 22:49:40 2013 +0100
     2.3 @@ -0,0 +1,94 @@
     2.4 +/*
     2.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
     2.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     2.7 + *
     2.8 + * This code is free software; you can redistribute it and/or modify it
     2.9 + * under the terms of the GNU General Public License version 2 only, as
    2.10 + * published by the Free Software Foundation.
    2.11 + *
    2.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    2.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    2.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    2.15 + * version 2 for more details (a copy is included in the LICENSE file that
    2.16 + * accompanied this code).
    2.17 + *
    2.18 + * You should have received a copy of the GNU General Public License version
    2.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    2.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    2.21 + *
    2.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    2.23 + * or visit www.oracle.com if you need additional information or have any
    2.24 + * questions.
    2.25 + */
    2.26 +
    2.27 +/*
    2.28 + * @test
    2.29 + * @bug 6356530
    2.30 + * @summary -Xlint:serial does not flag abstract classes with concrete methods/members
    2.31 + * @compile/fail/ref=FinalVariableAssignedToInCatchBlockTest.out -XDrawDiagnostics FinalVariableAssignedToInCatchBlockTest.java
    2.32 + */
    2.33 +
    2.34 +import java.io.IOException;
    2.35 +
    2.36 +public class FinalVariableAssignedToInCatchBlockTest {
    2.37 +    public void m1(int o)
    2.38 +    {
    2.39 +        final int i;
    2.40 +        try {
    2.41 +            if (o == 1) {
    2.42 +                throw new IOException();
    2.43 +            } else if (o == 2) {
    2.44 +                throw new InterruptedException();
    2.45 +            } else {
    2.46 +                throw new Exception();
    2.47 +            }
    2.48 +        } catch (IOException e) {
    2.49 +            i = 1;
    2.50 +        } catch (InterruptedException ie) {
    2.51 +            i = 2;
    2.52 +        } catch (Exception e) {
    2.53 +            i = 3;
    2.54 +        } finally {
    2.55 +            i = 4;
    2.56 +        }
    2.57 +    }
    2.58 +
    2.59 +    public void m2(int o)
    2.60 +    {
    2.61 +        final int i;
    2.62 +        try {
    2.63 +            if (o == 1) {
    2.64 +                throw new IOException();
    2.65 +            } else if (o == 2) {
    2.66 +                throw new InterruptedException();
    2.67 +            } else {
    2.68 +                throw new Exception();
    2.69 +            }
    2.70 +        } catch (IOException e) {
    2.71 +            i = 1;
    2.72 +        } catch (InterruptedException ie) {
    2.73 +            i = 2;
    2.74 +        } catch (Exception e) {
    2.75 +            i = 3;
    2.76 +        }
    2.77 +    }
    2.78 +
    2.79 +    public void m3(int o) throws Exception
    2.80 +    {
    2.81 +        final int i;
    2.82 +        try {
    2.83 +            if (o == 1) {
    2.84 +                throw new IOException();
    2.85 +            } else if (o == 2) {
    2.86 +                throw new InterruptedException();
    2.87 +            } else {
    2.88 +                throw new Exception();
    2.89 +            }
    2.90 +        } catch (IOException e) {
    2.91 +            i = 1;
    2.92 +        } catch (InterruptedException ie) {
    2.93 +            i = 2;
    2.94 +        }
    2.95 +        i = 3;
    2.96 +    }
    2.97 +}
     3.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     3.2 +++ b/test/tools/javac/T6326693/FinalVariableAssignedToInCatchBlockTest.out	Tue Jul 02 22:49:40 2013 +0100
     3.3 @@ -0,0 +1,3 @@
     3.4 +FinalVariableAssignedToInCatchBlockTest.java:52:13: compiler.err.var.might.already.be.assigned: i
     3.5 +FinalVariableAssignedToInCatchBlockTest.java:92:9: compiler.err.var.might.already.be.assigned: i
     3.6 +2 errors

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