UVSELP: segfaults using GCC 6+ or CLANG [TESTS]

[dennisguse]

UVSELP segfaults using newer compilers (Debian 9, MacOS: gcc and clang)
TravisCI with Ubuntu 14.04 works.

To investigate the problem, I compiled UVSELP with debug flags (-g) and found that the error is triggered by the pointer *gsp0Ptr in excite.c:70.

This pointer is derived from function parameters: gsp0Ptr = GSP0_TABLE + GSP0_TERMS * gsp0.

It feels as if gsp0 is handled differently by the newer compilers...
Or that the width changed.

NOTE: sadly the code is undocumented.

GDB output:

user@noname:~/hack/STL/src/is54$ gdb --args "/home/user/hack/STL/bin/uvselp" -q -nolog -pf test_data/voice.src test_data/voice-pf.rek
Reading symbols from /home/user/hack/STL/bin/uvselp...done.
(gdb) run
Starting program: /home/user/hack/STL/bin/uvselp -q -nolog -pf test_data/voice.src test_data/voice-pf.rek
***************************************************************

           (C) Copyright 1990, Motorola Inc., U.S.A.

***************************************************************
Input speech file: ........ test_data/voice.src
Output speech file: ....... test_data/voice-pf.rek

Program received signal SIGSEGV, Segmentation fault.
0x000055555555684c in EXCITE (gsp0=357913773, lag=0, rs00=0, rs11=3.68934881e+19, rs22=-0, 
    pVecPtr=0x5555557765f0, x1VecPtr=0x5555557774d0, x2VecPtr=0x555555777590, 
    oPtr=0x555555777898) at /home/user/hack/STL/src/is54/excite.c:70
70	  gamma2 = 0.5 * rs22 * *gsp0Ptr;
(gdb) bt
#0  0x000055555555684c in EXCITE (gsp0=357913773, lag=0, rs00=0, rs11=3.68934881e+19, 
    rs22=-0, pVecPtr=0x5555557765f0, x1VecPtr=0x5555557774d0, x2VecPtr=0x555555777590, 
    oPtr=0x555555777898) at /home/user/hack/STL/src/is54/excite.c:70
#1  0x000055555556c566 in T_SUB (sfIndex=2) at /home/user/hack/STL/src/is54/t_sub.c:193
#2  0x000055555556e44f in main (argc=3, argv=0x7fffffffe360)
    at /home/user/hack/STL/src/is54/vselp.c:510
(gdb)