clip-operator-test-meta-argb32 test fails with a crash on OS X 10.5.7

here's the relevant parts of the crash report:

Exception Type:  EXC_BAD_ACCESS (SIGABRT)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000003795ff7d
Crashed Thread:  0

Thread 0 Crashed:
0   libSystem.B.dylib             	0x9548ce42 __kill + 10
1   libSystem.B.dylib             	0x954ff23a raise + 26
2   libSystem.B.dylib             	0x9550b679 abort + 73
3   libSystem.B.dylib             	0x955003db __assert_rtn + 101
4   libcairo.2.dylib              	0x000b2f46 0xa9000 + 40774
5   libcairo.2.dylib              	0x000c9a02 _cairo_scaled_font_fini_internal + 34 (cairo-scaled-font.c:723)
6   libcairo.2.dylib              	0x000c9a8d _cairo_scaled_font_fini + 45 (cairo-scaled-font.c:746)
7   libcairo.2.dylib              	0x000ca078 _cairo_scaled_font_map_destroy + 136 (cairo-scaled-font.c:389)
8   libcairo.2.dylib              	0x000b37f7 _cairo_font_face_reset_static_data + 23 (cairo-font-face.c:772)
9   libcairo.2.dylib              	0x000b2deb cairo_debug_reset_static_data + 11 (cairo-debug.c:67)
10  clip-operator                 	0x00002741 cairo_test_fini + 113 (cairo-test.c:224)
11  clip-operator                 	0x000048d6 cairo_test + 518 (cairo-test.c:1359)
12  clip-operator                 	0x0000226b main + 27 (clip-operator.c:196)
13  clip-operator                 	0x00001966 start + 54

Thread 0 crashed with X86 Thread State (32-bit):
  eax: 0x00000000  ebx: 0x9550b639  ecx: 0xbffff26c  edx: 0x9548ce42
  edi: 0x00517480  esi: 0x0010b704  ebp: 0xbffff288  esp: 0xbffff26c
   ss: 0x0000001f  efl: 0x00200282  eip: 0x9548ce42   cs: 0x00000007
   ds: 0x0000001f   es: 0x0000001f   fs: 0x00000000   gs: 0x00000037
  cr2: 0xa0655938