Description:
Possibly useless stacktrace without symbols:

Stack trace of thread 201679:
#0 0x00007f2df9f89d22 raise (libc.so.6 + 0x3cd22)
#1 0x00007f2df9f73862 abort (libc.so.6 + 0x26862)
#2 0x00007f2df9f73747 __assert_fail_base.cold (libc.so.6 + 0x26747)
#3 0x00007f2df9f82616 __assert_fail (libc.so.6 + 0x35616)
#4 0x00007f2dfa14163f n/a (libcairo.so.2 + 0x2863f)
#5 0x00007f2dfa141d0e cairo_debug_reset_static_data (libcairo.so.2 + 0x28d0e)
#6 0x000055d8a11a552c n/a (pango-view + 0x852c)
#7 0x000055d8a11a2239 n/a (pango-view + 0x5239)
#8 0x00007f2df9f74b25 __libc_start_main (libc.so.6 + 0x27b25)
#9 0x000055d8a11a251e n/a (pango-view + 0x551e)

Stack trace of thread 201682:
#0 0x00007f2dfa39d33d FcCharSetIsSubset (libfontconfig.so.1 + 0xb33d)
#1 0x00007f2dfa39e70c FcCharSetMerge (libfontconfig.so.1 + 0xc70c)
#2 0x00007f2dfa3b8f3b FcFontSetSort (libfontconfig.so.1 + 0x26f3b)
#3 0x00007f2dfa5962fe n/a (libpangoft2-1.0.so.0 + 0x82fe)
#4 0x00007f2dfa4bf2c1 n/a (libglib-2.0.so.0 + 0x822c1)
#5 0x00007f2df99e3259 start_thread (libpthread.so.0 + 0x9259)
#6 0x00007f2dfa04b5e3 __clone (libc.so.6 + 0xfe5e3)


Additional info:
* pango 1:1.48.7-1

Steps to reproduce:
$ pango-view -q -t .
pango-view: ../cairo/src/cairo-hash.c:217: _cairo_hash_table_destroy: Assertion `hash_table->live_entries == 0' failed.