Hi,
The X-Server crashes with a segfault due to a NULL pointer dereference,
perfectly reproducable with a certain X client (mtt -- motif teletext
decoder). Stacktrace below. Setting Option "no_accel" workarounds
this. Hardware is a i386 machine with a Matrox G200. Anyone has a
quick idea what this might be?
cu,
Gerd
==============================[ cut here ]==============================
(gdb) c
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x0825de38 in DrawTETextScanlineWidth12 (base=0x40980000, glyphp=0x883aab0,
line=0, width=12, glyphwidth=12) at xaaTEGlyph.c:868
868 bits |= SHIFT_L(glyphp[1][line],12);
(gdb) bt
#0 0x0825de38 in DrawTETextScanlineWidth12 (base=0x40980000,
glyphp=0x883aab0, line=0, width=12, glyphwidth=12) at xaaTEGlyph.c:868
#1 0x0825cfa3 in XAATEGlyphRendererScanlineLSBFirst (pScrn=0x881e8e0, x=1,
y=91, w=12, h=19, skipleft=0, startline=1, glyphs=0x883aab0,
glyphWidth=12, fg=0, bg=0, rop=12, planemask=0) at xaaTEGlyph.c:402
#2 0x0823e611 in XAAGlyphBltTEColorExpansion (pScrn=0x881e8e0, xInit=1,
yInit=142837096, font=0x0, fg=0, bg=-1, rop=3, planemask=4294967295,
cclip=0x8945c7c, nglyph=1, gBase=0x0, ppci=0x883899c) at xaaTEText.c:281
#3 0x0823e297 in XAAPolyText16TEColorExpansion (pDraw=0x8945c50,
pGC=0x893f238, x=0, y=20, count=1, chars=0x893bf5b) at xaaTEText.c:97
#4 0x0842fe9e in miSpritePolyText16 (pDrawable=0x8945c50, pGC=0x893f238, x=0,
y=20, count=1, chars=0x893bf5b) at misprite.c:1848
#5 0x08352206 in doPolyText (client=0x88ad5a0, c=0xbfffed00)
at dixfonts.c:1392
#6 0x083524ed in PolyText (client=0x88ad5a0, pDraw=0x0, pGC=0x0, pElt=0x0,
endReq=0x0, xorg=0, yorg=0, reqType=142846640, did=0) at dixfonts.c:1473
#7 0x0833548c in ProcPolyText (client=0x88ad5a0) at dispatch.c:2356
#8 0x083314ca in Dispatch () at dispatch.c:450
#9 0x08343271 in main (argc=2, argv=0xbffff244, envp=0xbffff250) at main.c:435
#10 0x4005e8ae in __libc_start_main () from /lib/libc.so.6
(gdb) print line
$1 = 0
(gdb) print glyph
No symbol "glyph" in current context.
(gdb) print glyphp
$2 = (unsigned int **) 0x883aab0
(gdb) print glyphp[0]
$3 = (unsigned int *) 0x0
(gdb) print glyphp[1]
$4 = (unsigned int *) 0x0
(gdb)
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