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List:       apache-stdcxx-dev
Subject:    [jira] Commented: (STDCXX-309)
From:       "Martin Sebor (JIRA)" <jira () apache ! org>
Date:       2006-12-15 23:08:21
Message-ID: 12896658.1166224101623.JavaMail.jira () brutus
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    [ http://issues.apache.org/jira/browse/STDCXX-309?page=comments#action_12458966 ] \
  
Martin Sebor commented on STDCXX-309:
-------------------------------------

The change isn't quite correct. The slightly modified original test case below still \
fails:

$ cat z.cpp && gmake z && ./z
#include <cassert>
#include <cstddef>
#include <valarray>

int main ()
{
    const int a[] = { 1, 2, 3, 4, 5, 6 };

    const std::valarray<int> v (a, sizeof a / sizeof *a);

    const std::size_t start = 5;
    std::valarray<std::size_t> length (1, 1);
    std::valarray<std::size_t> stride (1, 1);

    const std::gslice gsl (start, length, stride);

    for (int i = 0; i != 2; ++i) {
        const std::valarray<int> vsl = v [gsl];
        assert (a [start] == vsl [0]);
    }
} 
CC -c -D_RWSTDDEBUG   -mt -D_RWSTD_USE_CONFIG -I/nfs/devco/sebor/dev/stdlib/include \
-I/build/sebor/sunpro-5.8.j1-15S/include \
-I/nfs/devco/sebor/dev/stdlib/examples/include  -library=%none -g  -xarch=v9 +w   \
z.cpp CC z.o -o z -library=%none -L/build/sebor/sunpro-5.8.j1-15S/lib  -mt  -xarch=v9 \
-L/build/sebor/sunpro-5.8.j1-15S/lib -lstd15S   -lm  Assertion failed: a [start] == \
vsl [0], file z.cpp, line 19 Abort (core dumped)


> std::valarray::operator[](std::gslice) bad result
> -------------------------------------------------
> 
> Key: STDCXX-309
> URL: http://issues.apache.org/jira/browse/STDCXX-309
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 26. Numerics
> Affects Versions: 4.1.2, 4.1.3
> Environment: all
> Reporter: Martin Sebor
> Assigned To: Martin Sebor
> Fix For: 4.2
> 
> 
> The program below aborts at runtime with the latest trunk:
> $ cat t.cpp && nice gmake t && ./t
> #include <cassert>
> #include <cstddef>
> #include <valarray>
> int main ()
> {
> const int a[] = { 1, 2, 3, 4, 5, 6 };
> const std::valarray<int> v (a, sizeof a / sizeof *a);
> const std::size_t          start = 5;
> std::valarray<std::size_t> length (1, 1);
> std::valarray<std::size_t> stride (1, 1);
> const std::gslice gsl (start, length, stride);
> const std::valarray<int> vsl = v [gsl];
> assert (a [start] == vsl [0]);
> }
> aCC -c -I/nfs/devco/sebor/dev/stdlib/include/ansi -I/usr/include  -D_RWSTDDEBUG   \
> -mt -D_RWSTD_USE_CONFIG -I/nfs/devco/sebor/dev/stdlib/include \
> -I/build/sebor/aCC-3.70-15S/include -I/nfs/devco/sebor/dev/stdlib/examples/include  \
> -Aa +nostl  -g +d  +DD64 +w +W392 +W655 +W684 +W818 +W819 +W849   t.cpp aCC t.o -o \
> t -Aa +nostl -Wl,+s -Wl,+vnocompatwarnings   -mt +DD64 \
> -L/build/sebor/aCC-3.70-15S/lib -lstd15S   -lm  Assertion failed: a [start] == vsl \
> [0], file t.cpp, line 19 ABORT instruction (core dumped)

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