Bug#336406: marked as done (g++-4.0: problem when string function fails to return string)
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>From ross@homemail.org Sat Oct 29 19:42:02 2005
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From: Ross Johnson <ross@homemail.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: g++-4.0: problem when string function fails to return string
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Date: Sat, 29 Oct 2005 21:41:59 -0500
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Package: g++-4.0
Version: 4.0.2-2
Severity: normal
In the following 4-line program, Test() fails to return a string
(as promised) and no compiler warning is given. If executed,
this program seg faults. It seems to me that either the compiler
should provide a warning or the string library should not crash.
#include <string>
using namespace std;
string Test (int i) { }
main (int argc, char *argv[]) { Test(0); }
-- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (500, 'testing'), (500, 'stable'), (50, 'unstable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.12-1-k7
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)
Versions of packages g++-4.0 depends on:
ii gcc-4.0 4.0.2-2 The GNU C compiler
ii gcc-4.0-base 4.0.2-2 The GNU Compiler Collection (base
ii libc6 2.3.5-6 GNU C Library: Shared libraries an
ii libstdc++6-4.0-dev 4.0.2-2 The GNU Standard C++ Library v3 (d
g++-4.0 recommends no packages.
-- no debconf information
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>From jwnimmer@alum.mit.edu Sun Oct 30 04:32:44 2005
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Subject: Re: Bug#336406: g++-4.0: problem when string function fails to
return string
From: Jeremy Nimmer <jwnimmer@alum.mit.edu>
To: 336406-done@bugs.debian.org
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Date: Sun, 30 Oct 2005 07:32:12 -0500
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On Sat, 2005-10-29 at 21:41 -0500, Ross Johnson wrote:
> In the following 4-line program, Test() fails to return a string
> (as promised) and no compiler warning is given. If executed,
> this program seg faults. It seems to me that either the compiler
> should provide a warning
It does; you just have to turn on warnings.
> or the string library should not crash.
$ g++ -Wall test.cc
test.cc: In function `std::string Test(int)':
test.cc:3: warning: control reaches end of non-void function
test.cc: At global scope:
test.cc:4: warning: ISO C++ forbids declaration of `main' with no type
Should you like, you can also turn on -Werror.
Thanks,
- Jeremy
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