i have entered a bug for gimp (#309170) in which gimp would crash when i opened an image of the same resolution as my current screen. in that situation, gimp automatically downscales the image to fit on the screen. when gimp was compiled with -mfpmath=sse the crash would occur. on recompiling without that option, gimp operates correctly. the complete thread for the bug can be found at http://bugzilla.gnome.org/show_bug.cgi?id=309170, however you can find the details for my system and the compilation options below: [ebuild R ] media-gfx/gimp-2.2.7-r1 -aalib (-altivec) -debug +doc +gimpprint +gtkhtml -hardened +jpeg +lcms -mmx +mng +png +python -scanner -smp -sse +svg +tiff +wmf 0 kB linux kernel 2.6.12 emerge --info Portage 2.0.51.19 (default-linux/x86, gcc-3.4.4, glibc-2.3.5-r0, 2.6.12-love1 i686) ================================================================= System uname: 2.6.12-love1 i686 Intel(R) Pentium(R) M processor 1500MHz Gentoo Base System version 1.6.12 Python: dev-lang/python-2.3.5,dev-lang/python-2.4.1-r1 [2.4.1 (#1, Jun 20 2005, 17:52:12)] dev-lang/python: 2.3.5, 2.4.1-r1 sys-apps/sandbox: [Not Present] sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.5, 1.8.5-r3, 1.6.3, 1.9.5, 1.7.9-r1, 1.4_p6 sys-devel/binutils: 2.15.92.0.2-r10 sys-devel/libtool: 1.5.16 virtual/os-headers: 2.6.8.1-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-Os -march=pentium-m -mmmx -msse -msse2 -fforce-addr -ftracer -mfpmath=sse -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/lib/X11/xkb /usr/lib/mozilla/defaults/pref /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/splash /etc/terminfo /etc/env.d" CXXFLAGS="-Os -march=pentium-m -mmmx -msse -msse2 -fforce-addr -ftracer -mfpmath=sse -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms strict" GENTOO_MIRRORS="ftp://mirror.pacific.net.au/linux/Gentoo http://mirror.isp.net.au/pub/gentoo/ ftp://mirror.isp.net.au/pub/gentoo/" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 X a52 aac acpi alsa avi bash-completion berkdb bitmap-fonts bonobo bzip2 cairo cdr crypt cups curl dbus divx4linux dvd eds emboss encode esd exif fam fbcon foomaticdb gd gdbm gif gnome gpm gstreamer gtk gtk2 guile hal howl imagemagick imlib java jpeg ldap libg++ libwww mad mikmod mmx mono motif mozilla mp3 mpeg mysql ncurses nptl offensive ogg oggvorbis opengl oss pam pcmcia pda pdflib perl pic png python qt quicktime readline samba sdl spell sqlite sse sse2 ssl svg tcpd tetex theora tiff truetype truetype-fonts type1-fonts usb v4l vorbis xinerama xml2 xv xvid zlib video_cards_radeon userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CBUILD, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS
We need a testcase.
To produce a testcase, you could try extracting the routine that is miscompiled and attach it to this bug (in a compilable form, so preprocessed with all needed headers). I believe the GIMP folk can help you with this. It might be that the bug is visible by just looking at the assembly code generated by the compiler (-S).
No feedback in 3 months.
never got any feedback from the gimp folk to provide a test case. so i will just stick to compiling without -mfpmath=sse as a work around. invalid doesn't seem to be the right sort of resolution state, since there is a bug. maybe suspended would be better, recognizing that there is a bug, but that it probably won't be fixed.
Without a test case, the bug report is invalid even if you're seeing a legitimate bug. That's why it is closed as INVALID. Bugs are put in the SUSPENDED state if the problem is reproducible but not fixable.