Thread 1 "TEST.x" received signal SIGSEGV, Segmentation fault.
0x00000003fc68c4e5 in XmRenderTableCopy (table=0xaeeb0, tags=tags@entry=0x0, 
    tag_count=tag_count@entry=0)
    at /usr/src/debug/motif-2.3.6-1/lib/Xm/XmRenderT.c:1709
1709	  if (_XmRTDisplay(table))

[Crash here because the value of table is bogus.  See below.

+bt
#0  0x00000003fc68c4e5 in XmRenderTableCopy (table=0xaeeb0, 
    tags=tags@entry=0x0, tag_count=tag_count@entry=0)
    at /usr/src/debug/motif-2.3.6-1/lib/Xm/XmRenderT.c:1709
#1  0x00000003fc6831ba in XmFontListCopy (fontlist=<optimized out>)
    at /usr/src/debug/motif-2.3.6-1/lib/Xm/XmFontList.c:637
#2  0x00000003fc657920 in InitializeTextStruct (tf=tf@entry=0x6000af730)
    at /usr/src/debug/motif-2.3.6-1/lib/Xm/TextF.c:7295
#3  0x00000003fc657e67 in Initialize (request=request@entry=0x6000afb40, 
    new_w=new_w@entry=0x6000af730, args=args@entry=0xffffbd60, 
    num_args=num_args@entry=0xffffb320)
    at /usr/src/debug/motif-2.3.6-1/lib/Xm/TextF.c:7817
#4  0x00000003fc469bb1 in CallInitialize (
    class=0x3fc72c440 <xmTextFieldClassRec>, 
    req_widget=req_widget@entry=0x6000afb40, 
    new_widget=new_widget@entry=0x6000af730, args=args@entry=0xffffbd60, 
    num_args=num_args@entry=8) at /usr/src/debug/libXt-1.1.5-1/src/Create.c:226
#5  0x00000003fc46a65c in xtCreate (
    name=name@entry=0xffffb950 "fixedColumnRow0", class=class@entry=0x0, 
    widget_class=widget_class@entry=0x3fc72c440 <xmTextFieldClassRec>, 
    parent=0x1fc5dd590, parent@entry=0x6000af0d0, default_screen=0x600052780, 
    args=args@entry=0xffffbd60, num_args=num_args@entry=8, 
    typed_args=typed_args@entry=0x0, num_typed_args=num_typed_args@entry=0, 
    parent_constraint_class=0x3fc720dc0 <xmFormClassRec>, 
    post_proc=post_proc@entry=0x3fc469bf0 <widgetPostProc>)
    at /usr/src/debug/libXt-1.1.5-1/src/Create.c:416
#6  0x00000003fc46a906 in _XtCreateWidget (
    name=name@entry=0xffffb950 "fixedColumnRow0", 
    widget_class=widget_class@entry=0x3fc72c440 <xmTextFieldClassRec>, 
    parent=parent@entry=0x6000af0d0, args=args@entry=0xffffbd60, 
    num_args=num_args@entry=8, typed_args=typed_args@entry=0x0, 
    num_typed_args=num_typed_args@entry=0)
    at /usr/src/debug/libXt-1.1.5-1/src/Create.c:570
#7  0x00000003fc46abd9 in XtCreateWidget (name=0xffffb950 "fixedColumnRow0", 
    widget_class=0x3fc72c440 <xmTextFieldClassRec>, parent=0x6000af0d0, 
    args=0xffffbd60, num_args=8)
    at /usr/src/debug/libXt-1.1.5-1/src/Create.c:589
#8  0x00000003fc658a81 in XmCreateTextField (parent=<optimized out>, 
    name=<optimized out>, arglist=<optimized out>, argcount=<optimized out>)
    at /usr/src/debug/motif-2.3.6-1/lib/Xm/TextF.c:10645
#9  0x000000010040882d in mosprshCreateSpreadsheet (parentFM=0x6000acc60, 
    spreadSheetTitle=0x100421087 "Measuring Unit Specification", 
    rowNames=0x6000ab4f0, columnNames=0x6000ab4b0, cellSize=0, 
    mosprshCheckButtonCallback=0x0) at mosprshx.c:242
[...]

+p *table
$1 = (struct __XmRenderTableRec *) 0x56f700001ea1
+p *$
Cannot access memory at address 0x56f700001ea1
+f 2
#2  0x00000003fc657920 in InitializeTextStruct (tf=tf@entry=0x6000af730)
    at /usr/src/debug/motif-2.3.6-1/lib/Xm/TextF.c:7295
7295	     TextF_FontList(tf) = (XmFontList)XmFontListCopy(TextF_FontList(tf));
+p tf->text.font_list
$2 = (XmFontList) 0xaeeb0

[This is the bad pointer that was propagated to XmRenderTableCopy.  I
didn't chase down where it came from.]