I've been following gv for years on serveral slackware boxes.   The latest upgrade
cores on startup.   Here's the log/backtrace:

 gv
Warning: Representation size 2 must match superclass's to override internalWidth
Segmentation fault (core dumped)

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Reading symbols from /usr/local/bin/gv...done.
[New LWP 5234]

warning: Can't read pathname for load map: Input/output error.
Core was generated by `gv'.
Program terminated with signal 11, Segmentation fault.
#0  0xb74e8420 in main_arena () from /lib/libc.so.6

Thread 1 (LWP 5234):
#0  0xb74e8420 in main_arena () from /lib/libc.so.6
No symbol table info available.
#1  0xb77bd355 in ?? () from /usr/lib/libXt.so.6
No symbol table info available.
#2  0xb77bdf7d in ?? () from /usr/lib/libXt.so.6
No symbol table info available.
#3  0xb77be495 in _XtCreateWidget () from /usr/lib/libXt.so.6
No symbol table info available.
#4  0xb77be82e in XtCreateManagedWidget () from /usr/lib/libXt.so.6
No symbol table info available.
#5  0x0806639c in main (argc=1, argv=0xbfcb3a64) at main.c:1156
        cont_child = {0x887a0f8, 0x88816d0, 0x8882228, 0x8882c18, 0x8883438, 0x88835d8, 0x8883990, 0x8884a30, 0x8884e38, 0x8885200, 0x8885638, 0x88857e8, 0x8885978, 0x8885b08, 0x8885cb0, 0x8885e30, 0x8886df8, 0x8886f68, 0x88870d8, 0x8887248, 0x88873b8, 0x88875b0, 0x88877f8, 0x8887bb8, 0x8888988, 0x0 <repeats 25 times>}
        cont_child_num = 25
        maximum_width = <optimized out>
        maximum_height = <optimized out>
        n = 0
        dim_forced = 143057556
        args = {{name = 0x80add54 "resize", value = 0}, {name = 0x80adccd "label", value = 134872230}, {name = 0x808452d "maximumWidth", value = 1260}, {name = 0x8084547 "maximumHeight", value = 756}, {name = 0x8084563 "minimumWidth", value = 400}, {name = 0x808457d "minimumHeight", value = 430}, {name = 0x0, value = 0}, {name = 0x0, value = 0}, {name = 0x0, value = 0}, {name = 0x0, value = 0}, {name = 0x0, value = 0}, {name = 0x0, value = 0}, {name = 0x0, value = 0}, {name = 0x0, value = 0}, {name = 0x8084180 "U\211åWVSèZ", value = 0}, {name = 0xbfcb3978 "\210\071Ë¿Ì´\004\bõ|;·<\221\n\b¸9Ë¿\231A\b\b", value = 134759085}, {name = 0x0, value = 134910268}, {name = 0xbfcb3988 "¸9Ë¿\231A\b\b", value = 134526156}, {name = 0xb73b7cf5 "\201Ãÿò\022", value = 134910268}, {name = 0xbfcb39b8 "8:Ë¿¶í9·\001", value = 134758809}}
        number = <optimized out>
        c = <optimized out>