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Posted to dev@stdcxx.apache.org by "Martin Sebor (JIRA)" <ji...@apache.org> on 2006/12/16 00:08:21 UTC
[jira] Commented: (STDCXX-309)
std::valarray::operator[](std::gslice) bad result
[ 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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