The check in Engine/fgens.c:212

    if (!(ff.flen & (ff.flen - 1L)) || ff.flen > MAXLEN)
      goto powOfTwoLen;

is not enough. There is a bug with all the oscillators where the
size of the table must be a power of 2 (oscil, foscil, buzz, ...)
if the csounder sets a negative size of the table not a pow-of-2,
because `ftp->lenmask' is 0xFFFFFFFF. Example:

  oscil 3, 2, 1
  f1 0 -1234 10 1    ; -1024 works

fixed.

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