Here is the gdb output and stacktrace and bug report
----------------
(gdb) run
Starting program: /usr/local/bin/gretl_x11
[New Thread 3860.0x14bc]
[New Thread 3860.0x162c]
[New Thread 3860.0x1330]
[New Thread 3860.0x990]
[New Thread 3860.0xd8c]
Program received signal SIGILL, Illegal instruction.
0x004da50c in date (nt=0, pd=1, sd0=1) at ../lib/src/gretl_utils.c:58
58
(gdb) bt
#0 0x004da50c in date (nt=0, pd=1, sd0=1) at ../lib/src/gretl_utils.c:58
#1 0x004f1c75 in ntodate (datestr=0x22ba60 "x\334\017 \024", t=0,
dset=0x200474b0) at ../lib/src/dataio.c:742
#2 0x0047cd56 in set_sample_label (pdinfo=0x200474b0) at menustate.c:718
#3 0x0045ea6a in mark_dataset_as_modified () at gui_utils.c:695
#4 0x0045eb52 in real_register_data (flag=5, user_fname=0x0, list=0x0) at
gui_utils.c:776
#5 0x004182dc in dwiz_make_changes (dlg=0x202950d0, opts=0x202a2ed0,
dwinfo=<optimized out>) at datawiz.c:363
#6 dwiz_finalize (dlg=0x202950d0, dwinfo=<optimized out>, cancel=<optimized
out>) at datawiz.c:1668
#7 0x6f5b575f in g_closure_invoke () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#8 0x6f5c79d9 in g_signal_handler_disconnect () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#9 0x6f5cf5c6 in g_signal_emit_valist () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#10 0x6f5cf736 in g_signal_emit () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#11 0x6ae63d59 in gtk_button_clicked () from
/cygdrive/c/cygwin/bin/cyggtk-x11-2.0-0.dll
#12 0x6ae64e00 in gtk_button_get_alignment () from
/cygdrive/c/cygwin/bin/cyggtk-x11-2.0-0.dll
#13 0x6f5b575f in g_closure_invoke () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#14 0x6f5c7233 in g_signal_handler_disconnect () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#15 0x6f5cf5c6 in g_signal_emit_valist () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#16 0x6f5cf736 in g_signal_emit () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#17 0x6ae63cb9 in gtk_button_released () from
/cygdrive/c/cygwin/bin/cyggtk-x11-2.0-0.dll
#18 0x6ae63ce1 in gtk_button_released () from
/cygdrive/c/cygwin/bin/cyggtk-x11-2.0-0.dll
#19 0x6af0cee1 in gtk_marshal_VOID__UINT_STRING () from
/cygdrive/c/cygwin/bin/cyggtk-x11-2.0-0.dll
#20 0x6f5b575f in g_closure_invoke () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#21 0x6f5c7829 in g_signal_handler_disconnect () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#22 0x6f5cf401 in g_signal_emit_valist () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#23 0x6f5cf736 in g_signal_emit () from
/cygdrive/c/cygwin/bin/cyggobject-2.0-0.dll
#24 0x6b023786 in gtk_widget_get_realized () from
/cygdrive/c/cygwin/bin/cyggtk-x11-2.0-0.dll
#25 0x6af0b463 in gtk_propagate_event () from
/cygdrive/c/cygwin/bin/cyggtk-x11-2.0-0.dll
#26 0x6af0b80f in gtk_main_do_event () from
/cygdrive/c/cygwin/bin/cyggtk-x11-2.0-0.dll
#27 0x67bbc5c6 in gdk_x11_register_standard_event_type () from
/cygdrive/c/cygwin/bin/cyggdk-x11-2.0-0.dll
#28 0x6f78cb08 in g_main_context_dispatch () from
/cygdrive/c/cygwin/bin/cygglib-2.0-0.dll
#29 0x6f78d208 in g_main_context_dispatch () from
/cygdrive/c/cygwin/bin/cygglib-2.0-0.dll
#30 0x6f78d6e1 in g_main_loop_run () from
/cygdrive/c/cygwin/bin/cygglib-2.0-0.dll
#31 0x6af0a7fd in gtk_main () from
/cygdrive/c/cygwin/bin/cyggtk-x11-2.0-0.dll
#32 0x00456b1b in main (argc=1, argv=0x22ccb0) at gretl.c:694
(gdb) list
53 *
54 * Returns: the date corresponding to @nt, as a double-precision number.
55 */
56
57 double date (int nt, int pd, const double sd0)
58 {
59 int ysd = (int) sd0, yy, pp, yp;
60 int p10 = 10;
61
62 if (pd == 1) {
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Bug report
https://sourceforge.net/tracker/?func=detail&aid=3504570&group_id...