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Crash with mtr and latest ncurses

From: Dr. Werner Fink
Subject: Crash with mtr and latest ncurses
Date: Mon, 10 Apr 2017 12:46:37 +0200
User-agent: Mutt/1.6.2 (2016-07-01)


the crash does happen in _nc_init_acs_sp() of ncurses/tinfo/lib_acs.c

 gdb --args ./mtr
 (gdb) run
 Starting program: /home/abuild/rpmbuild/BUILD/mtr-0.87/mtr
 Program received signal SIGSEGV, Segmentation fault.
 _nc_init_acs_sp (address@hidden) at ../ncurses/tinfo/lib_acs.c:95
 95                  real_map[j] = 0;
 (gdb) list
 90           * the mapping information in the SCREEN struct so we can decide 
how to
 91           * render it.
 92           */
 93          if (real_map != fake_map) {
 94              for (j = 1; j < ACS_LEN; ++j) {
 95                  real_map[j] = 0;
 96                  fake_map[j] = A_ALTCHARSET | (chtype) j;
 97                  if (SP_PARM)
 98                      SP_PARM->_screen_acs_map[j] = FALSE;
 99              }
 (gdb) print real_map
 $1 = (chtype *) 0x0
 (gdb) bt
 #0  _nc_init_acs_sp (address@hidden) at ../ncurses/tinfo/lib_acs.c:95
 #1  0x00007ffff769ea30 in _nc_setupscreen_sp (address@hidden, 
slines=<optimized out>, scolumns=<optimized out>, 
     address@hidden <_IO_2_1_stdout_>, filtered=<optimized out>, 
address@hidden) at ../ncurses/base/lib_set_term.c:586
 #2  0x00007ffff769ab81 in newterm_sp (sp=<optimized out>, address@hidden 
"xterm", ofp=<optimized out>, ifp=<optimized out>)
     at ../ncurses/base/lib_newterm.c:222
 #3  0x00007ffff769b0bc in newterm (address@hidden "xterm", ofp=<optimized 
out>, ifp=<optimized out>) at ../ncurses/base/lib_newterm.c:352
 #4  0x00007ffff7697276 in initscr () at ../ncurses/base/lib_initscr.c:89
 #5  0x0000555555559e0d in mtr_curses_open () at curses.c:700
 #6  0x0000555555560b11 in display_open () at display.c:101
 #7  0x0000555555557e81 in main (argc=<optimized out>, argv=<optimized out>) at 


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          a peeing section in a swimming pool." -- Edward Burr

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