(gdb) bt full
#0  0x00007f81c317c9c8 in raise () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f81c317e65a in abort () from /lib64/libc.so.6
No symbol table info available.
#2  0x00007f81c3175187 in __assert_fail_base () from /lib64/libc.so.6
No symbol table info available.
#3  0x00007f81c3175232 in __assert_fail () from /lib64/libc.so.6
No symbol table info available.
#4  0x00007f81ca5059b0 in _cairo_array_index (array=<optimized out>, 
    index=<optimized out>) at cairo-array.c:182
No locals.
#5  0x00007f81ca507dc9 in _cairo_array_index (
    array=array@entry=0x560837e23680, index=<optimized out>)
    at cairo-array.c:167
No locals.
#6  0x00007f81ca575f6a in cairo_cff_font_subset_charstrings_and_subroutines (
    font=0x560837e23610) at cairo-cff-subset.c:1791
        i = 1
        element = <optimized out>
        glyph = 45472
        cid = <optimized out>
#7  cairo_cff_font_subset_font (font=0x560837e23610) at cairo-cff-subset.c:1976
        status = <optimized out>
#8  cairo_cff_font_generate (length=<optimized out>, data=<optimized out>, 
    font=<optimized out>) at cairo-cff-subset.c:2589
        status = <optimized out>
#9  _cairo_cff_subset_init (cff_subset=cff_subset@entry=0x7ffd199c6c60, 
    subset_name=subset_name@entry=0x7ffd199c6c20 "CairoFont-3-0", 
    font_subset=font_subset@entry=0x7ffd199c6d80) at cairo-cff-subset.c:2959
        font = 0x560837e23610
        status = <optimized out>
        data = 0x0
        length = 0
        i = <optimized out>
#10 0x00007f81ca5c3caa in _cairo_pdf_surface_emit_cff_font_subset (
    font_subset=0x7ffd199c6d80, surface=0x56083906e890)
    at cairo-pdf-surface.c:5186
        status = <optimized out>
        subset = {
          family_name_utf8 = 0x560839019a40 "Source Han Sans CN Regular", 
          ps_name = 0x5608390d4280 "\350\003", widths = 0x560837b28a70, 
          x_min = -1,0693359375, y_min = -0,4150390625, x_max = 1,97509765625, 
          y_max = 1,17529296875, ascent = 0,92822265625, 
          descent = -0,23583984375, data = 0x560837d93c20 " h\246\067\bV", 
          data_length = 3132}
        name = "CairoFont-3-0\000\000\000\320\001\000\000\000\000\000\000\036\324Uʁ\177\000\000q\223c\346\002\200\377\377\217l\234\031\375\177\000\000 \000\000\000\000\000\000\000\201\000\000\000P\000\000"
#11 _cairo_pdf_surface_emit_unscaled_font_subset (font_subset=0x7ffd199c6d80, 
    closure=0x56083906e890) at cairo-pdf-surface.c:5900
        surface = 0x56083906e890
#12 0x00007f81ca577e1b in _cairo_sub_font_collect (closure=0x7ffd199c6d30, 
    entry=0x560839125b00) at cairo-scaled-font-subsets.c:746
        sub_font = 0x560839125b00
        collection = 0x7ffd199c6d30
        subset = {scaled_font = 0x560839271af0, font_id = 3, subset_id = 0, 
          glyphs = 0x56083923cc00, utf8 = 0x560838faed90, glyph_names = 0x0, 
          to_latin_char = 0x0, latin_to_subset_glyph_index = 0x0, 
          num_glyphs = 3, is_composite = 1, is_scaled = 0, is_latin = 0}
        i = 0
        j = <optimized out>
#13 _cairo_scaled_font_subsets_foreach_internal (font_subsets=<optimized out>, 
    font_subset_callback=font_subset_callback@entry=0x7f81ca5c3c50 <_cairo_pdf_surface_emit_unscaled_font_subset>, closure=closure@entry=0x56083906e890, 
    type=type@entry=CAIRO_SUBSETS_FOREACH_UNSCALED)
    at cairo-scaled-font-subsets.c:1067
        collection = {glyphs = 0x56083923cc00, utf8 = 0x560838faed90, 
          glyphs_size = 412, to_latin_char = 0x5608390d3c00, 
          latin_to_subset_glyph_index = 0x560838f50c10, max_glyph = 2, 
          num_glyphs = 3, subset_id = 0, status = CAIRO_STATUS_SUCCESS, 
          font_subset_callback = 0x7f81ca5c3c50 <_cairo_pdf_surface_emit_unscaled_font_subset>, font_subset_callback_closure = 0x56083906e890}
        sub_font = 0x560839125b00
        is_scaled = <optimized out>
        is_user = 0
#14 0x00007f81ca578b07 in _cairo_scaled_font_subsets_foreach_unscaled (
    font_subsets=<optimized out>, 
    font_subset_callback=font_subset_callback@entry=0x7f81ca5c3c50 <_cairo_pdf_surface_emit_unscaled_font_subset>, closure=closure@entry=0x56083906e890)
    at cairo-scaled-font-subsets.c:1095
No locals.
#15 0x00007f81ca5bfd88 in _cairo_pdf_surface_emit_font_subsets (
    surface=0x56083906e890) at cairo-pdf-surface.c:5950
        status = <optimized out>
#16 _cairo_pdf_surface_finish (abstract_surface=0x56083906e890)
    at cairo-pdf-surface.c:2031
        surface = 0x56083906e890
        info = <optimized out>

        catalog = <optimized out>
        status = CAIRO_STATUS_SUCCESS
        status2 = <optimized out>
        size = <optimized out>
        i = <optimized out>
        global = <optimized out>
#17 0x00007f81ca55d246 in _cairo_surface_finish (surface=0x56083906e890)
    at cairo-surface.c:1030
        status = <optimized out>
#18 0x00007f81ca55ddf7 in INT_cairo_surface_finish (surface=0x56083906e890)
    at cairo-surface.c:1077
        surface = 0x56083906e890
#19 0x00007f81ca53398f in _cairo_paginated_surface_finish (
    abstract_surface=0x5608393188f0) at cairo-paginated-surface.c:213
        surface = 0x5608393188f0
        status = <optimized out>
#20 0x00007f81ca55d246 in _cairo_surface_finish (surface=0x5608393188f0)
    at cairo-surface.c:1030
        status = <optimized out>
#21 0x00007f81ca55ddf7 in INT_cairo_surface_finish (surface=0x5608393188f0)
    at cairo-surface.c:1077
        surface = 0x5608393188f0
#22 0x00007f81cc82610e in WebKit::WebPrintOperationGtk::printPagesDone() ()
   from /lib64/libwebkit2gtk-4.0.so.37
No symbol table info available.
#23 0x00007f81cc82617a in WebKit::WebPrintOperationGtk::printPagesIdleDone(void*) () from /lib64/libwebkit2gtk-4.0.so.37
No symbol table info available.
#24 0x00007f81c4858081 in gdk_threads_dispatch_free (data=0x560837e3c020)
    at gdk.c:733
        dispatch = 0x560837e3c020
#25 0x00007f81c8b35928 in g_source_callback_unref (cb_data=0x56083914eeb0)
    at gmain.c:1561
        cb_data = 0x56083914eeb0
        callback = 0x56083914eeb0
#26 0x00007f81c8b370b6 in g_source_destroy_internal (source=0x56083917c790, 
    context=0x56083792db80, have_lock=1) at gmain.c:1207
        tmp_list = <optimized out>
        old_cb_data = 0x56083914eeb0
        old_cb_funcs = 0x7f81c8e26880 <g_source_callback_funcs>
#27 0x00007f81c8b38d10 in g_main_dispatch (context=0x56083792db80)
    at gmain.c:3177
        dispatch = <optimized out>
        prev_source = 0x7f814c002880
        was_in_call = 0
        user_data = 0x560837e3c020
        callback = 0x7f81c4857fec <gdk_threads_dispatch>
        cb_funcs = 0x7f81c8e26880 <g_source_callback_funcs>
        cb_data = 0x56083914eeb0
        need_destroy = 1
        source = 0x56083917c790
        current = 0x56083795c720
        i = 0
#28 g_main_context_dispatch (context=context@entry=0x56083792db80)
    at gmain.c:3769
No locals.
#29 0x00007f81c8b38fd8 in g_main_context_iterate (context=0x56083792db80, 
    block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at gmain.c:3840
        max_priority = -10
        timeout = 0
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 4
        fds = 0x560837b28ff0
#30 0x00007f81c8b392f2 in g_main_loop_run (loop=0x560839070120) at gmain.c:4034
        __func__ = "g_main_loop_run"
#31 0x00007f81cc8264c0 in WebKit::WebPrintOperationGtk::print(_cairo_surface*, double, double) () from /lib64/libwebkit2gtk-4.0.so.37
No symbol table info available.
#32 0x00007f81cc827168 in WebKit::WebPrintOperationGtkUnix::startPrint(WebCore::PrintContext*, unsigned long) () from /lib64/libwebkit2gtk-4.0.so.37
No symbol table info available.
#33 0x00007f81cc7a1516 in WebKit::WebPage::drawPagesForPrinting(unsigned long, WebKit::PrintInfo const&, unsigned long) () from /lib64/libwebkit2gtk-4.0.so.37