Package: g++-4.7 Version: 4.7.0-8 Severity: normal Tags: upstream Dear Maintainer,
* What led up to the situation? I ported feel++ to gcc47 and found out that it generates buggy code(generating segfault) in optimisation mode. Here are the steps to reproduce it - install feel++-apps - execute feel_doc_myfunctionspace (compiled using CMAKE_BUILD_TYPE=Release) - it generates a segfault what happens is that a data structure containing only a double data member seem to be optimized away and became dangling reference (invalid read using valgrind). The code crashes at line 220 of doc/manual/tutorial/myfunctionspace.cpp when evaluating the expression template data structure g defined on line 215. - in gcc47 with CMAKE_BUILD_TYPE=Debug, it works without problems - with gcc45, gcc46, clang31 on Linux and OSX there are no problems at all in RelWithDebInfo and Release mode (CMAKE_BUILD_TYPE) Hence I believe that this is a bug in gcc47 code generation/optimisation. -- System Information: Debian Release: wheezy/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 3.2.0-2-amd64 (SMP w/1 CPU core) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages g++-4.7 depends on: ii gcc-4.7 4.7.0-8 ii gcc-4.7-base 4.7.0-8 ii libc6 2.13-32 ii libgmp10 2:5.0.5+dfsg-1.1 ii libmpc2 0.9-4 ii libmpfr4 3.1.0-5 ii libstdc++6-4.7-dev 4.7.0-8 ii zlib1g 1:1.2.7.dfsg-2 g++-4.7 recommends no packages. Versions of packages g++-4.7 suggests: pn g++-4.7-multilib <none> pn gcc-4.7-doc <none> pn libstdc++6-4.7-dbg <none> -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
