In my local build I added the following *printf* statements:
int ibdsav;
* printf( "DEBUG: altmov_: ibdsav initialized to %d = 0x%X\n", ibdsav,
ibdsav ); fflush(stdout);*...
if (k == *kopt) {
*printf( "DEBUG: altmov_: goto L80 invoked in outer loop.\n" );
fflush(stdout);* goto L80;
}
...
*printf( "DEBUG: altmov_: predsq = %g, predsav = %g.\n", predsq, presav );
fflush(stdout);* if (predsq > presav) {
presav = predsq;
ksav = k;
stpsav = step;
ibdsav = isbd;
*printf( "DEBUG: altmov_: ibdsav set to %d = 0x%X inside
if(predsq>presav)\n", ibdsav, ibdsav ); fflush(stdout);* }
...
*printf( "DEBUG: altmov_: before changing xnew ibdsav was %d = 0x%X\n",
ibdsav, ibdsav ); fflush(stdout);* if (ibdsav < 0) {
xnew[-ibdsav] = sl[-ibdsav];
}
if (ibdsav > 0) {
xnew[ibdsav] = su[ibdsav];
}
The printout suggests that the cause is that the initial value of ibdsav
has not been set before it was used as an array index:
...
DEBUG: altmov_: ibdsav initialized to 1072693248 = 0x3FF00000
DEBUG: altmov_: goto L80 invoked in outer loop.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: predsq = -nan, predsav = 0.
DEBUG: altmov_: before changing xnew ibdsav was 1072693248 = 0x3FF00000
That caused application to crash:
Exiting due to signal #11: Segmentation fault
...
:frame: 0x2b6681724fc9 ...b/libnlopt_cxx.so.0 bobyqa(int, int,
double*, double const*, double const*, double const*, nlopt_stopping*,
double*, double (*)(unsigned int, double const*, double*, void*), void*)
Please fix this by initializing the value of ibdsav before use:
int ibdsav* = 0*;
Thanks,
Michael
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