Why isn't gdb working for me

edit

Background

I am currently trying to build an autonomous drone using ROS on my Rapsberry Pi which is running an Ubuntu MATE 16.04 LTS. Solving the Computer Vision problem of recognising red circles as of now.

Specific Problem

I am constantly getting the error I get in this question. To help me solve this, I have decided to use gdb. However, the command rosrun --prefix 'gdb run --args' zlab_drone vdstab does not seem to be working for me. zlab_drone is the name of the package and vdstab is the name of the executable I am trying to run. Since this is inside a ROS environment, I have grabbed the syntax from here, and used the suggestions in #q222530.

When I invoke this command, even with tui, I get a SIGSEGV and when I invoke list inside gdb itself, the program does not stay at a particular point and keeps listing a different line till it is out of range. This is quite a weird issue.

I managed to make it work without this issue earlier by using a different command, I reckon. I just cannot remember how I made it work last time.

UPDATES

So, I try to run my program with the command:

rosrun --prefix 'gdb run --args' zlab_drone vdstab

and I get:

GNU gdb (Ubuntu 7.11-0ubuntu1) 7.11
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "arm-linux-gnueabihf".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /home/sharan/catkin_ws/devel/lib/zlab_drone/vdstab...done.
(gdb)

Which is all okay till now. Now I run start, at which point I get:

(gdb) start 
Temporary breakpoint 1 at 0x1e436: file /home/sharan/catkin_ws/src/zlab_drone/src/vidStab.cpp, line 136.
Starting program: /home/sharan/catkin_ws/devel/lib/zlab_drone/vdstab 

Program received signal SIGSEGV, Segmentation fault.
0x76fd9822 in ?? () from /lib/ld-linux-armhf.so.3
(gdb)

Which is a bit weird. To see where the segmentation fault is, I try to list. The first time I get this:

(gdb) list 
122 //  warpAffine(cv_ptr->image, orig_warped, invTrans.rowRange(0,2), 
123 //          Size());
124     
125     // Publishing (Only uncomment, if you're sure nothing is broken
126     // in this section)
127     /*
128     cv_ptr->image = orig_warped; 
129     image_pub_.publish(cv_ptr->toImageMsg());   
130     */
131     }
(gdb)

The second time, I get this:

(gdb) list 
132 
133 };
134 
135 int main(int argc, char** argv)
136 {
137   ros::init(argc, argv, "video_stabilizer");
138   Tracker tr;
139   ros::spin();
140   return 0;
141 }
(gdb)

Third:

(gdb) 
142 ...