gwplus crashes when running example on README.md

[KristianKarl]

When running the Toy Graph example in the README.md, a crash occurs if gwplus is built with mode=RELEASE. However, using mode=DEBUG runs fine.

The output from the crash under gdb:

❯ gdb --args bin/gwplus prime examples/toygraph/wellformed.json testpath.json -v
GNU gdb (Ubuntu 15.0.50.20240219-0ubuntu1) 15.0.50.20240219-git
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Reading symbols from bin/gwplus...
(gdb) run
Starting program: /home/krikar/dev/gwplus/bin/gwplus prime examples/toygraph/wellformed.json testpath.json -v
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[2024-03-05 10:45:57] - Verbose enabled.
[2024-03-05 10:45:57] - Coverage Criterion = Prime Path Coverage
[2024-03-05 10:45:57] - Loading examples/toygraph/wellformed.json...
[2024-03-05 10:45:57] - Starting Element is an EDGE
[2024-03-05 10:45:57] -          # Vertices = 2
[2024-03-05 10:45:57] -             # Edges = 3
[2024-03-05 10:45:57] -        # Edge Pairs = 5
[2024-03-05 10:45:57] - # Test Requirements = 6
[2024-03-05 10:45:57] -    # Direct Splices = 14

 7: 5 2
 s -> 7;
 s -> 1;
 s -> 0;
 7 -> 3;
 7 -> 0;
 4 -> 7;
 4 -> 1;
 3 -> 4;
 1 -> 3;
 1 -> 0;
 0 -> 7;
 0 -> 1;

 8: 7 0
 s -> 8;
 s -> 1;
 8 -> 3;
 8 -> 1;
 4 -> 8;
 4 -> 1;
 3 -> 4;
 1 -> 8;
 1 -> 3;

 9: 8 1
 s -> 9;
 9 -> 3;
 4 -> 9;
 3 -> 4;

 10: 3 4 9
 s -> 10;
[2024-03-05 10:45:57] -        # HyperPaths = 2

Program received signal SIGSEGV, Segmentation fault.
0x000055555557d520 in ?? ()
(gdb) bt
#0  0x000055555557d520 in ?? ()
#1  0x000055555556af62 in clone_vpath ()
#2  0x000055555556a587 in constructPathTrace_hpg ()
#3  0x000055555556a9b6 in constructTestPaths_hpg ()
#4  0x0000555555569186 in main ()
(gdb) 

[yavuzkoroglu]

This seems to be caused by a bad commit on my part. Currently, I failed to reproduce the issue on both Ubuntu and Mac OS, so I am not sure if this bug still exists or not.

Keeping this issue open for now...

[yavuzkoroglu]

I managed to reproduce the issue and corrected the Makefile.