[Pkg-tcltk-devel] Bug#465462: Bug#465462: Bug#465462: Bug#465462: /usr/bin/wish8.5: segfault for wish

[Sergei Golovan]

On 2/14/08, Joe English <jenglish at flightlab.com> wrote:
>
>  Remi Vanicat wrote:
>
>  > with xmaxima:
>  > #0  0x00002b10c17f9c4d in GetTkFontAttributes (ftFont=0x0, faPtr=0xaa8b58)
>  >     at /home/sergei/debian/tcl-2/tk8.5-8.5.1/unix/../unix/tkUnixRFont.c:107
>  > #1  0x00002b10c17fa0b6 in InitFont (tkwin=0xab1240, pattern=0xacaa90,
>  > fontPtr=0xaa8b20)
>  >     at /home/sergei/debian/tcl-2/tk8.5-8.5.1/unix/../unix/tkUnixRFont.c:241
>  > #2  0x00002b10c17fa450 in TkpGetFontFromAttributes (tkFontPtr=0x0,
>  > tkwin=0xab1240, faPtr=0x7fffe95f1500)
>  >     at /home/sergei/debian/tcl-2/tk8.5-8.5.1/unix/../unix/tkUnixRFont.c:369
>
>  [...]
>
>
>  This is probably the same as Tk bug #1090382 [*].
>  It appears to be caused by a misconfigured fontconfig
>  system; running `fc-cache -fv` should fix it.

For me it looks very strange that tkFontPtr is NULL in #2 and fontPtr
is not NULL in #1. The relevant code is:

    fontPtr = (UnixFtFont *) tkFontPtr;
    if (fontPtr != NULL) {
	FinishedWithFont(fontPtr);
    }
    fontPtr = InitFont(tkwin, pattern, fontPtr);

I can't explain the fact that fontPtr isn't NULL other than by a bug in GCC.

-- 
Sergei Golovan