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From "Martin Sebor (JIRA)" <j...@apache.org>
Subject [jira] Updated: (STDCXX-313) std::valarray::apply() uses uninitialized storage
Date Thu, 11 Oct 2007 00:45:57 GMT

     [ https://issues.apache.org/jira/browse/STDCXX-313?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Martin Sebor updated STDCXX-313:
--------------------------------

    Severity: Runtime Error

> std::valarray::apply() uses uninitialized storage
> -------------------------------------------------
>
>                 Key: STDCXX-313
>                 URL: https://issues.apache.org/jira/browse/STDCXX-313
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: 26. Numerics
>    Affects Versions: 4.1.2, 4.1.3
>         Environment: all
>            Reporter: Martin Sebor
>            Assignee: Martin Sebor
>             Fix For: 4.2
>
>
> The program below is designed to detect memory corruption (such as the use of uninitialized
storage) in valarray. When compiled
> with the latest trunk it aborts at runtime.
> $ cat t.cpp && make t && ./t
> #include <cassert>
> #include <valarray>
> struct S {
>     const S* const self;
>     S (): self (this) { }
>     S (const S &s): self (this) { assert (&s == s.self); }
>     ~S () { assert (this == self); }
>     S& operator= (const S &s) {
>         assert (this == self && &s == s.self);
>         return *this;
>     }
> };
> S foo (S s) { return s; }
> S bar (const S &s) { return s; }
> int main ()
> {
>     const std::valarray<S> a (1);
>     a.apply (foo);
>     a.apply (bar);
> }
> gcc -c -I/build/sebor/dev/stdlib/include/ansi -D_RWSTDDEBUG    -D_RWSTD_USE_CONFIG -I/build/sebor/dev/stdlib/include
-I/build/sebor/gcc-4.1.0-11s/include -I/build/sebor/dev/stdlib/examples/include  -pedantic
-nostdinc++ -g  -W -Wall -Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long   t.cpp
> gcc t.o -o t  -L/build/sebor/gcc-4.1.0-11s/lib -lstd11s  -lsupc++ -lm 
> Assertion failed: this == self && &s == s.self, file t.cpp, line 10
> Abort (core dumped)

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