Comment 1 for bug 1577108

Verified using a minimal db on a softIoc:

record(waveform, "wf") {
  field(FTVL, "DOUBLE")
  field(NELM, "1")
  field(FLNK, "co")
}
record(calcout, "co") {
  field(CALC, "A")
  field(INPA, "wf")
}

While 3.14 always fetches correctly the waveform's element, 3.15 consistently fetches 0.