Comment 0 for bug 58519

I have compiled and installed libcairo 1.2.4 from source. I have verified that
the host application, Code::Blocks, is using the library with...

kip@kip-laptop:~$ ldd /usr/local/bin/codeblocks | grep -i cairo
        libpangocairo-1.0.so.0 => /usr/lib/libpangocairo-1.0.so.0 (0xb6ef1000)
        libcairo.so.2 => /usr/local/lib/libcairo.so.2 (0xb6e01000)

Executing codeblocks from gdb gives me...

(gdb) run
Starting program: /usr/local/bin/codeblocks
[Thread debugging using libthread_db enabled]
[New Thread -1229293888 (LWP 2548)]
[New Thread -1244337232 (LWP 2683)]
[New Thread -1252729936 (LWP 2684)]
[New Thread -1261122640 (LWP 2685)]
[New Thread -1269515344 (LWP 2686)]
[New Thread -1280705616 (LWP 2687)]
[New Thread -1297544272 (LWP 2694)]
codeblocks: cairo-ft-font.c:683: _cairo_ft_unscaled_font_set_scale: Assertion
`error == 0' failed.
codeblocks: cairo-ft-font.c:683: _cairo_ft_unscaled_font_set_scale: Assertion
`error == 0' failed.

Program received signal SIGABRT, Aborted.
[Switching to Thread -1297544272 (LWP 2694)]
0xffffe410 in __kernel_vsyscall ()

The full backtrace is as follows:

#0 0xffffe410 in __kernel_vsyscall ()
#1 0xb73519a1 in raise () from /lib/tls/i686/cmov/libc.so.6
#2 0xb73532b9 in abort () from /lib/tls/i686/cmov/libc.so.6
#3 0xb734af51 in __assert_fail () from /lib/tls/i686/cmov/libc.so.6
#4 0xb6ebd895 in _cairo_ft_unscaled_font_set_scale (unscaled=0x8a2bf38,
    scale=<value optimized out>) at cairo-ft-font.c:683
#5 0xb6ebf102 in cairo_ft_scaled_font_lock_face (abstract_font=0x830a638)
    at cairo-ft-font.c:2426
#6 0xb6f91260 in pango_cairo_fc_font_get_type ()
   from /usr/lib/libpangocairo-1.0.so.0
#7 0xb6c183cc in pango_fc_font_lock_face () from /usr/lib/libpangoft2-1.0.so.0
#8 0xb6a8e018 in ?? () from /usr/lib/pango/1.5.0/modules/pango-basic-fc.so
#9 0x0830a800 in ?? ()
#10 0x00000430 in ?? ()
#11 0xb7455320 in __malloc_initialize_hook () from /lib/tls/i686/cmov/libc.so.6
#12 0xb2a8fde0 in ?? ()
#13 0xb74477ed in in6addr_any () from /lib/tls/i686/cmov/libc.so.6
#14 0xb6d6d234 in ?? () from /usr/lib/libglib-2.0.so.0
#15 0xb2a8fdd8 in ?? ()
#16 0xb7455358 in __malloc_initialize_hook () from /lib/tls/i686/cmov/libc.so.6
#17 0x081135e0 in ?? ()
#18 0x00000008 in ?? ()
#19 0xb738ba64 in malloc_usable_size () from /lib/tls/i686/cmov/libc.so.6
---Type <return> to continue, or q <return> to quit---
#20 0xb6f0cfb3 in pango_engine_shape_get_type ()
   from /usr/lib/libpango-1.0.so.0
#21 0xb6f1c2b4 in pango_shape () from /usr/lib/libpango-1.0.so.0
#22 0xb6f0fe6f in pango_layout_line_index_to_x ()
   from /usr/lib/libpango-1.0.so.0
#23 0xb6f12fbb in pango_layout_iter_get_char_extents ()
   from /usr/lib/libpango-1.0.so.0
#24 0xb6f13515 in pango_layout_iter_get_char_extents ()
   from /usr/lib/libpango-1.0.so.0
#25 0xb6f13e6c in pango_layout_iter_get_char_extents ()
   from /usr/lib/libpango-1.0.so.0
#26 0xb6f14cfa in pango_layout_get_pixel_size ()
   from /usr/lib/libpango-1.0.so.0
#27 0xb77ae4c9 in wxWindowDC::GetCharHeight ()
   from /usr/lib/libwx_gtk2u_core-2.6.so.0
#28 0xb78e9462 in wxGenericTreeCtrl::CalculateLineHeight ()
   from /usr/lib/libwx_gtk2u_core-2.6.so.0
#29 0xb78e96d1 in wxGenericTreeCtrl::SetImageList ()
   from /usr/lib/libwx_gtk2u_core-2.6.so.0
#30 0xb3adbf62 in ClassBrowserBuilderThread::BuildTree (this=0x8640f88)
    at classbrowserbuilderthread.cpp:97
#31 0xb3adc173 in ClassBrowserBuilderThread::Entry (this=0x8640f88)
    at classbrowserbuilderthread.cpp:85
---Type <return> to continue, or q <return> to quit---
#32 0xb7632bf0 in wxThreadInternal::PthreadStart ()
   from /usr/lib/libwx_baseu-2.6.so.0
#33 0xb7632c63 in wxPthreadStart () from /usr/lib/libwx_baseu-2.6.so.0
#34 0xb7562341 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#35 0xb73f24ee in clone () from /lib/tls/i686/cmov/libc.so.6