[jira] Commented: (STDCXX-333) std::wfilebuf extracts more than 1 character from a 1 byte file

["Martin Sebor (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/STDCXX-333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12469901 ] 

Martin Sebor commented on STDCXX-333:
-------------------------------------

How odd. I can reproduce this but only intermittently and with different results:

$ while [ $? -eq 0 ]; do ./t; done; true; while [ $? -eq 0 ]; do ./t; done
97 -1
97 -1
97 -1
97 -1
97 8
t: t.cpp:21: int main(): Assertion `std::wfilebuf::traits_type::eof () == c [1]' failed.
Aborted
97 -1
97 -1
97 -1
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97 -1
97 -1
97 104
: t.cpp:21: int main(): Assertion `std::wfilebuf::traits_type::eof () == c [1]' failed.
Aborted


> std::wfilebuf extracts more than 1 character from a 1 byte file
> ---------------------------------------------------------------
>
>                 Key: STDCXX-333
>                 URL: https://issues.apache.org/jira/browse/STDCXX-333
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: 27. Input/Output
>    Affects Versions: 4.1.3
>         Environment: gcc 3.2.3 on Linux
>            Reporter: Mark Brown
>
> I get an an abort when I run the following program on Linux.
> #include <cassert>
> #include <fstream>
> #include <iostream>
> int main ()
> {
>     {
>         std::filebuf fb;
>         fb.open ("file", std::ios::out);
>         fb.sputc ('a');
>     }
>     std::wfilebuf fb;
>     fb.pubimbue (std::locale ("en_US.UTF-8"));
>     fb.open ("file", std::ios::in);
>     const int c[] = { fb.sbumpc (), fb.sgetc () };
>     std::cout << c [0] << ' ' << c [1] << std::endl;
>     assert (L'a' == c [0]);
>     assert (std::wfilebuf::traits_type::eof () == c [1]);
> }
> test: test.cpp:21: int main(): Assertion `std::wfilebuf::traits_type::eof () == c [1]' failed.
> Aborted

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