possible fix for #2138

[oliveregger]

we got noted in matchbox ahdis/matchbox#424 that r5 extensions in r4 are throwing an error when validating against a profile where the r5 extensions are listed as discriminators. after a second validation in the same context the problem disappeared. we tracked it down that the xversion where not considered inside the slicing, attached a fix which helped solved our problem and i assume it should also fix #2138

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 13.55%. Comparing base (93f5c59) to head (15ee386).
⚠️ Report is 29 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2279      +/-   ##
============================================
- Coverage     13.64%   13.55%   -0.10%     
+ Complexity    38036    37736     -300     
============================================
  Files          2517     2495      -22     
  Lines        728379   727970     -409     
  Branches     212616   212500     -116     
============================================
- Hits          99418    98672     -746     
- Misses       595484   595890     +406     
+ Partials      33477    33408      -69     

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[grahamegrieve]

do we have a test case that this fixes?

[Boereck]

Is it expected to add a test case to the fhir-test-cases repository? I think I could cook up a condensed example during the next days based on the problem I reported in #2138 and create a PR to the aforementioned repository.

[grahamegrieve]

yes, need a test case there. In the validation tests