Ralph Corderoy <ra...@inputplus.co.uk> wrote:

> Hi David,
> > $ ./rpcemu Shutting down Allegro due to signal #11 Segmentation fault
> > $
> shows how to `bt full' since it seems you're not used to gdb(1).  That
> gives us the first clue what might be going on.

Hi Ralph

Thank you for your very prompt reply.

I visited

and read about rdb and then ran the command.  Here is the result of my
attempt to do something correctly!
Terminal output

zed@zed-pc:~$ cd /home/zed/rpcemu-0.8.15
zed@zed-pc:~/rpcemu-0.8.15$ gdb ./rpcemu
GNU gdb (Debian 7.12-6)
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
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 "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
Find the GDB manual and other documentation resources online at:
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./rpcemu...done.
(gdb) r
Starting program: /home/zed/rpcemu-0.8.15/rpcemu 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff4afc700 (LWP 21629)]
[New Thread 0x7ffff41ed700 (LWP 21630)]
[New Thread 0x7ffff28be700 (LWP 21631)]
[New Thread 0x7ffff20bd700 (LWP 21632)]
[New Thread 0x7fffe59ea700 (LWP 21633)]
[Thread 0x7fffe59ea700 (LWP 21633) exited]
[New Thread 0x7fffe59ea700 (LWP 21634)]
[New Thread 0x7fffe4fe3700 (LWP 21635)]

Thread 1 "rpcemu" received signal SIGSEGV, Segmentation fault.
0x00005555570becba in rcodeblock ()
(gdb) bt full
#0  0x00005555570becba in rcodeblock ()
No symbol table info available.
#1  0x00007fffffffdf70 in ?? ()
No symbol table info available.
#2  0x0000000000000000 in ?? ()
No symbol table info available.
which means nothing whatsoever to me - way beyond my paygrade!

Neither did I understand the instructions which followed "Improved gdb
output" on the website, so seek your further assistance, please?

I have three allegro packages installed: 
libjpgallwegro4.4 v2.2.2.2-10
liballegro4-dev v2.4.4.2-10
liballegro4.4 v2.4.4.2-10


CURSOR: An expert in four-letter words.

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