#0  __pthread_mutex_lock (mutex=0x7fffac9b18c0) at pthread_mutex_lock.c:50
  [Error: pthread_mutex_lock.c was not found in source tree]
#1  0x00007fcebcbf7125 in XrmQGetResource (db=0x7fcebe387850, names=names@entry=0x7fffac9b18a0, classes=classes@entry=0x7fffac9b18b0, pType=pType@entry=0x7fffac9b189c, pValue=pValue@entry=0x7fffac9b18c0) at ../../src/Xrm.c:2543
  [Error: ../../src/Xrm.c was not found in source tree]
#2  0x00007fcebcbd3832 in XGetDefault (dpy=0x7fcebe354fc0, prog=0x7fcebb42612b "ay[1] - shading->decode_array[0] >= ((double)2.22044604925031308085e-16L)", name=0x7fcebb42612f "] - shading->decode_array[0] >= ((double)2.22044604925031308085e-16L)") at ../../src/GetDflt.c:254
  [Error: ../../src/GetDflt.c was not found in source tree]
#3  0x00007fcebb3e505f in composite_glyphs (surface=0x3000000cb0000, op=1769472, _src=0x7fcebfcb4b98, src_x=-1068818080, src_y=32718, dst_x=-1153937080, dst_y=0, info=0x7fffac9b26c0) at /build/buildd/cairo-1.12.2/src/cairo-xlib-render-compositor.c:1404
  [Error: /build/buildd/cairo-1.12.2/src/cairo-xlib-render-compositor.c was not found in source tree]
#4  0x00007fcec0453e14 in ?? ()
#5  0x0000000000000000 in ?? ()