Bug#847995: Acknowledgement (gnuplot: segfault on plot, with wxt, and "Warning: Mismatch between the program and library build versions")

[Jaggz H]

More information:
It appears the segfault occurs if the plot window is resized and a
subsequent plot command is issued before the window redraws.  Not as
severe, but still a segfault.

Steps to reproduce:
1. ssh with port forwarding to system on which to run gnuplot in terminal
2. Extract attached datafile (called simply "g", from the attached "g.bz2")
4. plot [0:3000] "g" every ::70000::73000
5. Resize window
6. Before window finishes redrawing (takes maybe 10s over my slow wifi),
issue same plot command again

Run output follows:

$ gdb gnuplot
...
(gdb) run
Starting program: /usr/bin/gnuplot
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

        G N U P L O T
        Version 5.0 patchlevel 5    last modified 2016-10-02
...
        immediate help:   type "help"  (plot window: hit 'h')

Terminal type set to 'wxt'
gnuplot> plot [0:3000] "g" every ::70000::73000
03:16:22 PM: Warning: Mismatch between the program and library build
versions detected.
The library used 3.0 (wchar_t,compiler with C++ ABI 1009,wx
containers,compatible with 2.8),
and your program used 3.0 (wchar_t,compiler with C++ ABI 1010,wx
containers,compatible with 2.8).
[New Thread 0x7fffec609700 (LWP 24624)]
gnuplot> plot [0:3000] "g" every ::70000::73000

Thread 1 "gnuplot" received signal SIGSEGV, Segmentation fault.
wxtPanel::wxt_cairo_create_bitmap (this=this at entry=0x7fffe409f000)
    at ../../../src/wxterminal/wxt_gui.cpp:3585
3585    ../../../src/wxterminal/wxt_gui.cpp: No such file or directory.
(gdb) bt
#0  wxtPanel::wxt_cairo_create_bitmap (this=this at entry=0x7fffe409f000)
    at ../../../src/wxterminal/wxt_gui.cpp:3585
#1  0x0000000000517cac in wxtPanel::wxt_cairo_refresh (this=0x7fffe409f000)
    at ../../../src/wxterminal/wxt_gui.cpp:2865
#2  0x0000000000518ddd in wxt_text ()
    at ../../../src/wxterminal/wxt_gui.cpp:2077
#3  0x00000000004f3479 in term_end_plot () at ../../../src/term.c:556
#4  0x00000000004f9745 in term_end_plot () at ../../../src/term.c:548
#5  0x0000000000454555 in do_plot (plots=0x818130, pcount=pcount at entry=1)
    at ../../../src/graphics.c:928
#6  0x000000000047a02e in eval_plots () at ../../../src/plot2d.c:3388
#7  0x0000000000428247 in command () at ../../../src/command.c:625
#8  do_line () at ../../../src/command.c:420
#9  0x00000000004283ab in com_line () at ../../../src/command.c:322
#10 0x000000000041791c in main (argc=0, argv=0x7fffffffdd48)
    at ../../../src/plot.c:660
(gdb)

Another run using the same or a similar window-resize -> impatient repeated
plot command yielded this segfault and backtrace:
Thread 1 "gnuplot" received signal SIGSEGV, Segmentation fault.
0x00000000009cf800 in ?? ()
(gdb) bt
#0  0x00000000009cf800 in ?? ()
#1  0x0000000000517cac in wxtPanel::wxt_cairo_refresh (this=0x7fffe409f000)
    at ../../../src/wxterminal/wxt_gui.cpp:2865
#2  0x0000000000518ddd in wxt_text () at
../../../src/wxterminal/wxt_gui.cpp:2077
#3  0x00000000004f3479 in term_end_plot () at ../../../src/term.c:556
#4  0x00000000004f9745 in term_end_plot () at ../../../src/term.c:548
#5  0x0000000000454555 in do_plot (plots=0x81ac40, pcount=pcount at entry=1)
    at ../../../src/graphics.c:928
#6  0x000000000047a02e in eval_plots () at ../../../src/plot2d.c:3388
#7  0x0000000000428247 in command () at ../../../src/command.c:625
#8  do_line () at ../../../src/command.c:420
#9  0x00000000004283ab in com_line () at ../../../src/command.c:322
#10 0x000000000041791c in main (argc=0, argv=0x7fffffffdd48) at
../../../src/plot.c:660




On Mon, Dec 12, 2016 at 2:57 PM, Debian Bug Tracking System <
owner at bugs.debian.org> wrote:

> Thank you for filing a new Bug report with Debian.
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> 847995: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=847995
> Debian Bug Tracking System
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