Comment 2 for bug 931381

StacktraceTop:
 __pthread_mutex_lock (mutex=0x7fff36fcab30) at pthread_mutex_lock.c:50
 XrmQGetResource (db=0x1b899e0, names=<optimized out>, classes=<optimized out>, pType=0x7fff36fcab5c, pValue=0x7fff36fcab30) at ../../src/Xrm.c:2543
 XGetDefault (dpy=0x1b295a0, prog=0x7f7156ed0a27 "Xft", name=0x7f7156ed0a2b "antialias") at ../../src/GetDflt.c:254
 get_boolean_default (value=<synthetic pointer>, option=0x7f7156ed0a2b "antialias", dpy=0x1b295a0) at /build/buildd/cairo-1.10.2/src/cairo-xlib-screen.c:95
 _cairo_xlib_init_screen_font_options (info=0x2204c00, dpy=0x1b295a0) at /build/buildd/cairo-1.10.2/src/cairo-xlib-screen.c:143