error in schema and test machinery

[petrelharp]

Whoopsie!

[bhaller]

Good stuff, thanks for patching all this up!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.81%. Comparing base (fb295de) to head (3d45be3).
⚠️ Report is 2 commits behind head on fix_666.

Additional details and impacted files

@@             Coverage Diff             @@
##           fix_666     #669      +/-   ##
===========================================
- Coverage    76.89%   76.81%   -0.08%     
===========================================
  Files          117      117              
  Lines        78765    78765              
  Branches     14301    14294       -7     
===========================================
- Hits         60563    60504      -59     
- Misses       18202    18261      +59     

Files with missing lines	Coverage Δ
core/slim_globals.cpp	69.25% <ø> (ø)

... and 9 files with indirect coverage changes

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