[Bug 2029482] Re: pvget json error

[Andrew Johnson via Core-talk <core-talk at aps.anl.gov>]

This fix has been merged into the pvDataCPP module and will appear in
the next EPICS 7.0.x release, thanks for the report.

** Changed in: epics-base/7.0
       Status: Triaged => Fix Committed

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https://bugs.launchpad.net/bugs/2029482

Title:
  pvget json error

Status in EPICS Base:
  Fix Committed
Status in EPICS Base 7.0 series:
  Fix Committed

Bug description:
  I’ve been using `pvget -M json` and have noticed a problem with it
  when the PV has the alarm fields set like so:

  double lowAlarmLimit nan
  double lowWarningLimit nan
  double highWarningLimit nan
  double highAlarmLimit nan

  When I run pvget I get the following:

  > pvget -M json IOC:m1.RBV
  IOC:m1.RBV {"value":88.129999999999995,"alarm":{"severity":0,"status":0,"message":"NO_ALARM"},"timeStamp":{"secondsPastEpoch":1691063460,"nanoseconds":182366000,"userTag":0},"display":{"limitLow":-100.0,"limitHigh":100.0,"description":"motor 1","units":"degrees","precision":5,"form":{"index":0,"choices":["Default","String","Binary","Decimal","Hex","Exponential","Engineering"]}},"control":{"limitLow":-100.0,"limitHigh":100.0,"minStep":0.0},"valueAlarm":{"active":false,"lowAlarmLimit"Error in monitor handler : yajl_gen_invalid_number

  It looks like YAJL doesn’t like the nan values. If I set them to non-
  nan values then the error goes away.

  This is with base 7.0.7.

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