[bug #61643] grops: core dump when running and compiled with -Wsanitize=undefined

[Bjarni Ingi Gislason]

URL:
  <https://savannah.gnu.org/bugs/?61643>

                 Summary: grops: core dump when running and compiled with
-Wsanitize=undefined
                 Project: GNU troff
            Submitted by: bjarniig
            Submitted on: Wed 08 Dec 2021 06:29:17 PM UTC
                Category: Device grops
                Severity: 3 - Normal
              Item Group: Build/Installation
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

Subject: grops: core dump when running and compiled with -Wsanitize=undefined

traps: grops[17629] trap invalid opcode ip:555e4af69280 sp:7fff0bc51790
error:0 in grops[555e4af5d000+28000]

traps: grops[18200] trap invalid opcode ip:55a43e350280 sp:7ffcaeb8dcf0
error:0 in grops[55a43e344000+28000]

#0  0x000055a43e350280 in resource_manager::process_file
(this=0x55a43f433758, rank=0, fp=<optimized out>,
    filename=<optimized out>, outfp=<optimized out>) at
../src/devices/grops/psrm.cpp:1026
1026                    = (this->*(comment_table[i].proc))(ptr, rank,
fp, outfp);

(gdb) print i
$1 = 1

  Warnings from compilations:

../src/devices/grops/ps.cpp: In member function 'special':
../src/devices/grops/ps.cpp:1567:28: warning: 'i.130' may be used
uninitialized [-Wmaybe-uninitialized]
 1567 |       (this->*(proc_table[i].proc))(p, env);
      |                            ^
../src/devices/grops/ps.cpp:1567:28: note: 'i.130' was declared here
 1567 |       (this->*(proc_table[i].proc))(p, env);
      |                            ^
../src/devices/grops/psrm.cpp: In member function 'process_file':
../src/devices/grops/psrm.cpp:1026:43: warning: 'i.104' may be used
uninitialized in this function [-Wmaybe-uninitialized]
 1026 |                 = (this->*(comment_table[i].proc))(ptr, rank,
fp, outfp);
      |                                           ^
  CXX      src/devices/grotty/tty.o
 





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