Prefix increment and add errors

[jwillemsen]

* tests/orb/register_initial_references/server.cpp:

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (d4f75e4) 59.77% compared to head (1573660) 59.77%.

Files	Patch %	Lines
tests/orb/register_initial_references/server.cpp	16.66%	10 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #338   +/-   ##
=======================================
  Coverage   59.77%   59.77%           
=======================================
  Files         587      587           
  Lines       47962    47962           
  Branches     4226     4226           
=======================================
  Hits        28669    28669           
  Misses      16177    16177           
  Partials     3116     3116           

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