$ gdb --args gnumeric "/home/me/Book1.gnumeric"
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Reading symbols from gnumeric...done.
(gdb) run
Starting program: /usr/bin/gnumeric /home/me/Book1.gnumeric
Got object file from memory but can't read symbols: File truncated.
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffe6856700 (LWP 18864)]

(/usr/bin/gnumeric:18860): Gtk-WARNING **: Theme parsing error: gtk.css:101:18: Not using units is deprecated. Assuming 'px'.

(/usr/bin/gnumeric:18860): Gtk-WARNING **: Theme parsing error: gtk.css:101:20: Not using units is deprecated. Assuming 'px'.
[New Thread 0x7fffe5e4b700 (LWP 18865)]
[New Thread 0x7fffe543e700 (LWP 18866)]

(/usr/bin/gnumeric:18860): GLib-CRITICAL **: g_strtod: assertion 'nptr != NULL' failed

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff752f63a in go_data_vector_str_get_value (vec=<optimized out>, i=<optimized out>) at data/go-data-simple.c:685
685		return (*end)? go_nan: d;
(gdb) bt full
#0  0x00007ffff752f63a in go_data_vector_str_get_value (vec=<optimized out>, i=<optimized out>) at data/go-data-simple.c:685
        end = 0x150 <error: Cannot access memory at address 0x150>
        strs = <optimized out>
        d = 0
#1  0x00007ffff752df67 in go_data_get_vector_value (data=<optimized out>, column=0) at data/go-data.c:524
No locals.
#2  0x00007ffff754b1ad in map_discrete_calc_ticks (axis=0x10bc640) at graph/gog-axis.c:497
        val = <optimized out>
        l = 0x0
        ticks = 0x1253e10
        valid = <optimized out>
        maximum = 2.5
        minimum = 0.5
        tick_start = <optimized out>
        label_start = <optimized out>
        tick_nbr = <optimized out>
        label_nbr = <optimized out>
        i = 0
        j = <optimized out>
        index = 0
        major_tick = <optimized out>
        major_label = <optimized out>
#3  0x00007ffff7548e05 in gog_axis_calc_ticks (axis=0x10bc640) at graph/gog-axis.c:2111
---Type <return> to continue, or q <return> to quit---
        __FUNCTION__ = "gog_axis_calc_ticks"
#4  0x00007ffff7549236 in gog_axis_update (obj=0x10bc640) at graph/gog-axis.c:2676
        ptr = <optimized out>
        axis = 0x10bc640
        old_min = 0.5
        old_max = 0.5
        bounds = {val = {minima = 0.5, maxima = 2.5}, logical = {minima = -nan(0x8000000000000), maxima = -nan(0x8000000000000)}, 
          is_discrete = 1, center_on_ticks = 0, fmt = 0x0, date_conv = 0x0}
#5  0x00007ffff7531b88 in gog_object_update (obj=0x10bc640) at graph/gog-object.c:1595
        klass = 0x1149c00
        ptr = 0x0
        __FUNCTION__ = "gog_object_update"
#6  0x00007ffff7531b28 in gog_object_update (obj=0x73d540) at graph/gog-object.c:1588
        klass = 0x7cfc60
        ptr = 0x125a0c0
        __FUNCTION__ = "gog_object_update"
#7  0x00007ffff7531b28 in gog_object_update (obj=0x10c92b0) at graph/gog-object.c:1588
        klass = 0x10de4d0
        ptr = 0x1229e40
        __FUNCTION__ = "gog_object_update"
#8  0x00007ffff75393b6 in cb_graph_idle (graph=0x10c92b0) at graph/gog-graph.c:849
No locals.
#9  0x00007ffff65c2a65 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#10 0x00007ffff65c2dc8 in ?? () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#11 0x00007ffff65c308a in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#12 0x00007ffff6f311b5 in gtk_main () from /usr/lib/libgtk-3.so.0
No symbol table info available.
#13 0x000000000040371b in main (argc=<optimized out>, argv=<optimized out>) at main-application.c:392
        opened_workbook = <optimized out>
        with_gui = <optimized out>
        ioc = 0x816000
        wbv = <optimized out>
        wbcgs_to_kill = <optimized out>
        cc = 0x0
(gdb) 
