Matthias, Given the new information I just sent to the bug report, and since all current versions of gcc have this issue, it should not remain as "wishlist" in gcc-4.7 only.
I have tagged it "upstream" for now, and removed the "moreinfo" tag. Should I raise severity back to important, or to normal? Should I mark the other gcc packages as also affected by this bug (might require cloning the bug)? codesearch.debian.org reports lots of packages potentially using -O3 in CFLAGS: approximately 1800 packages, and some of them are present on nearly every Debian system and very important (like perl5), or extremely security sensitive (like krb5). Not all of these packages will actually build with -O3, and I assume the vast majority of them tries to stay away from unaligned accesses, anyway. Still, this crash-on-unaligned issue is quite unexpected on x86 and amd64, and I can easily imagine it being a boundary condition for an application that would only trigger in specially-crafted/corrupt input files. As for forwarding the report upstream myself, I never dealt with gcc upstream before. If you don't feel it might be better if someone in the Debian gcc team did it, I will do it. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh