Your message dated Wed, 03 Sep 2014 16:29:02 +0200 with message-id <[email protected]> and subject line closing old issues has caused the Debian Bug report #365245, regarding strange crash when linked with nvidia GL libraries to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 365245: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=365245 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: libstdc++6 Version: 4.1.0-1+b1 Severity: normal I came across a strange bug which I'm utterly unable to reproduce on anything but Debian unstable (including testing on Fedora Core 5). Basically, I've worked out (through using valgrind and gdb) that calling ifstream::read() causes a crash because an ios exception destructor calls free() with an invalid pointer. The crash only happens when a library that links against nvidia''s GL libraries is dynamically loaded. It also only happens when the library links with the gcc 4.1 standard C++ library. Below is a testcase. -- // testmod.cpp #include <python2.4/Python.h> #include <iostream> #include <fstream> using namespace std; static PyObject * testmod_foo(PyObject * /*self*/, PyObject * /*args*/) { ifstream file("/tmp"); char buffer[5]; file.read(buffer, 4); return Py_None; } static PyMethodDef TestmodMethods[] = { {"foo", testmod_foo, METH_VARARGS, "crash."}, {NULL, NULL, 0, NULL} }; PyMODINIT_FUNC inittestmod(void) { Py_InitModule("testmod", TestmodMethods); } --- To run this, you need python2.3-dev and nvidia-glx-dev 1.0.8756 installed. (I haven't actually verified that version 1.0.8756 is required, but this crash doesn't happen if you're using a different GL driver, like ATI's or mesa. It also doesn't happen if you don't link against the GL library.) Run: g++ -Wall -W -g -shared -o testmod.so -lGL testmod.cpp echo -e "import testmod\\ntestmod.foo()" | python2.3 What should happen is a simple exit. What does happen: $ echo -e "import testmod\\ntestmod.foo()" | python2.3 *** glibc detected *** free(): invalid pointer: 0xa7d7aa58 *** Aborted It's easy to work around in Debian: install libstdc++6-4.0-dbg, and then set LD_LIBRARY_PATH to have /usr/lib/debug first. That libstdc++ library, which comes from gcc 4.0, doesn't exhibit the problem. -- System Information: Debian Release: testing/unstable APT prefers unstable APT policy: (500, 'unstable') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.16-1-686-smp Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Versions of packages libstdc++6 depends on: ii gcc-4.1-base 4.1.0-1+b1 The GNU Compiler Collection (base ii libc6 2.3.6-7 GNU C Library: Shared libraries ii libgcc1 1:4.1.0-1+b1 GCC support library libstdc++6 recommends no packages. -- no debconf information
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--- Begin Message ---closing old issues, please feel free to re-open if you see any issues with 4.9.
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