Fix Groundness analysis in presence of TypeCast

[julienhenry]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.19%. Comparing base (7bb8e64) to head (a12181d).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2569   +/-   ##
=======================================
  Coverage   81.19%   81.19%           
=======================================
  Files         492      492           
  Lines       31008    31009    +1     
=======================================
+ Hits        25176    25177    +1     
  Misses       5832     5832           

Files with missing lines	Coverage Δ
src/ast/analysis/Ground.cpp	95.74% <100.00%> (+0.04%)	⬆️

... and 4 files with indirect coverage changes

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[quentin]

Thanks Julien. I can integrate a test if you have one.