System Environment:
--------------------------
Arch:           x86_64
Platform:       Surgabay
Libdrm:         (master)2.4.31
Mesa:           (8.0)e86d90eb208292916c8a04c5d75499492003dd16
Xserver:  (server-1.11-branch)xorg-server-1.11.3
Xf86_video_intel: (master)2.17.0-640-g13c960db9ef876ee99991d97dfc34fef184c0341
Kernel:	(drm-intel-fixes) c898261c0dad617f0f1080bedc02d507a2fcfb92


Bug detailed description:
------------------------- 
It segfaults at Mesa master and 8.0 branch on Ironlake and SandyBridge with errors: 
swrast/s_span.c:1078: _swrast_put_row: Assertion `datatype == 0x1406' failed.
 
Bisect shows 65b9c1dee6edbafb46f782ecc525c1dbdbf76e0d is the first bad commit.
commit 65b9c1dee6edbafb46f782ecc525c1dbdbf76e0d
Author:     Ian Romanick <ian.d.romanick@intel.com>
AuthorDate: Tue Jan 31 11:29:06 2012 -0700
Commit:     Ian Romanick <ian.d.romanick@intel.com>
CommitDate: Thu Feb 2 10:17:49 2012 -0700

    mesa: Convert colors if span ChanType and renderbuffer data type don't match

    This is a partial revert of f9874fe.  It turns out that the types
    don't always match.  Specifically, this can happen when doing
    glCopyPixels from a float FBO to a RGBA8 FBO.

    NOTE: This is a candidate for the 8.0 branch.

    Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45429
    Reviewed-by: Brian Paul <brianp@vmware.com>
    (cherry picked from commit 660ed923ded3552e023ef8c3dd9f92e6792f1bd2)

(gdb) bt
#0  0x00000030790362a5 in raise () from /lib64/libc.so.6
#1  0x0000003079037bbb in abort () from /lib64/libc.so.6
#2  0x000000307902eebe in __assert_fail_base () from /lib64/libc.so.6
#3  0x000000307902ef62 in __assert_fail () from /lib64/libc.so.6
#4  0x00007ffff62a8800 in _swrast_put_row (ctx=<optimized out>, rb=0xbcf010, datatype=33640, count=512, x=<optimized out>, y=<optimized out>, values=0x7ffff51fd010, mask=0x0)
    at swrast/s_span.c:1078
#5  0x00007ffff62a8d99 in _swrast_write_rgba_span (ctx=<optimized out>, span=<optimized out>) at swrast/s_span.c:1375
#6  0x00007ffff637c725 in copy_rgba_pixels (ctx=0x7ffff77b2040, srcx=0, srcy=<optimized out>, width=512, height=512, destx=0, desty=0) at swrast/s_copypix.c:192
#7  0x00007ffff637d546 in _swrast_CopyPixels (ctx=0x7ffff77b2040, srcx=0, srcy=0, width=512, height=512, destx=0, desty=0, type=6144) at swrast/s_copypix.c:636
#8  0x00007ffff62e1c3c in _mesa_meta_CopyPixels (ctx=0x7ffff77b2040, srcX=0, srcY=0, width=512, height=512, dstX=0, dstY=0, type=6144) at drivers/common/meta.c:1942
#9  0x00007ffff612e5df in intelCopyPixels (ctx=0x7ffff77b2040, srcx=0, srcy=0, width=512, height=512, destx=0, desty=0, type=6144) at intel_pixel_copy.c:228
#10 0x00007ffff6347877 in _mesa_CopyPixels (srcx=0, srcy=0, width=512, height=512, type=6144) at main/drawpix.c:232
#11 0x000000000042a188 in test_mipmap_copypixels (srcIntFormat=32856, dstIntFormat=32857, doPixelTransfer=1 '\001', useReadDrawPix=0 '\000')
    at /GFX/Test/Piglit/piglit/tests/fbo/fbo-mipmap-copypix.c:172
#12 0x000000000042a499 in piglit_display () at /GFX/Test/Piglit/piglit/tests/fbo/fbo-mipmap-copypix.c:258
#13 0x000000000042b2f4 in main (argc=1, argv=0x7fffffffe238) at /GFX/Test/Piglit/piglit/tests/util/piglit-framework.c:301

Reproduce steps:
----------------
1. start X
2. ./fbo-mipmap-copypix -auto -fbo