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Posted to issues@stdcxx.apache.org by "Martin Sebor (JIRA)" <ji...@apache.org> on 2008/01/21 19:48:34 UTC
[jira] Updated: (STDCXX-319) [LWG #596] std::filebuf::open(...,
ios::app) unexpectedly succeeds
[ https://issues.apache.org/jira/browse/STDCXX-319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Martin Sebor updated STDCXX-319:
--------------------------------
Severity: Incorrect Behavior
Remaining Estimate: 2h
Original Estimate: 2h
> [LWG #596] std::filebuf::open(..., ios::app) unexpectedly succeeds
> ------------------------------------------------------------------
>
> Key: STDCXX-319
> URL: https://issues.apache.org/jira/browse/STDCXX-319
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 27. Input/Output
> Affects Versions: 4.1.2, 4.1.3
> Environment: all
> Reporter: Martin Sebor
> Assignee: Martin Sebor
> Priority: Trivial
> Fix For: 4.2.1
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> According to filebuf.members, p2, filebuf::open(const char*, openmode mode) is not some combination of the flags listed in Table 113 the call is supposed to fail. Since ios::app only appears in conjunction with ios::out (and ios::binary|ios::out) the call in the program below should fail.
> $ cat t.cpp && make t && ./t
> #include <cassert>
> #include <fstream>
> int main ()
> {
> std::filebuf fb;
> const std::filebuf* const pfb = fb.open ("dummy", std::ios::app);
> assert (0 == pfb);
> }
> 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/../rwtest -I/build/sebor/dev/stdlib/../rwtest/include -I/build/sebor/dev/stdlib/tests/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/rwtest -lrwtest11s -L/build/sebor/gcc-4.1.0-11s/lib -lstd11s -lsupc++ -lm
> Assertion failed: 0 == pfb, file t.cpp, line 10
> Abort (core dumped)
--
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