Update; I ran it again and OK; then once with a segfault and then under
gdb it was OK.  So someting intermittent

Under valgrind I see

new alloc for instr 1:
==27172== Invalid read of size 16
==27172==    at 0x4F3CBCD: tabiasub (arrays.c:614)
==27172==    by 0x4E77AED: kperf_nodebug (csound.c:1591)
==27172==    by 0x4E7913D: csoundPerform (csound.c:2087)
==27172==    by 0x40158B: main (csound_main.c:318)
==27172==  Address 0x8 is not stack'd, malloc'd or (recently) free'd
==27172== 

csound command: Segmentation fault

No idea what is happening